[%# This Source Code Form is subject to the terms of the Mozilla Public
  # License, v. 2.0. If a copy of the MPL was not distributed with this
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  # defined by the Mozilla Public License, v. 2.0.
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[% SET title = "Bugzilla 4.4 Release Notes" %]
[% INCLUDE global/header.html.tmpl 
  title = title
  style_urls = ['skins/standard/page.css'] 
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<h1>[% title FILTER html %]</h1>

<ul class="bz_toc">
  <li><a href="#v44_introduction">Introduction</a></li>
  <li><a href="#v44_point">Updates in this 4.4.x Release</a></li>
  <li><a href="#v44_req">Minimum Requirements</a></li>
  <li><a href="#v44_feat">New Features and Improvements</a></li>
  <li><a href="#v44_issues">Outstanding Issues</a></li>
  <li><a href="#v44_upgrading">Notes On Upgrading From a Previous Version</a></li>
  <li><a href="#v44_code_changes">Code Changes Which May Affect
    Customizations and Extensions</a></li>
  <li><a href="#v44_previous">Release Notes for Previous Versions</a></li>
</ul>

<h2 id="v44_introduction">Introduction</h2>

<p>Welcome to Bugzilla 4.4! It has been over a year since we
  released Bugzilla 4.2 on February 2012, and this new major
  release comes with several new features and improvements. This release
  contains major improvements to WebServices, which were our main target in
  this release, a rewritten tagging system, a real MIME type auto-detection for
  attachments, improved support for Oracle, performance improvements and lots
  of other enhancements.</p>

<p>If you're upgrading, make sure to read <a href="#v44_upgrading">Notes On
  Upgrading From a Previous Version</a>. If you are upgrading from a release
  before 4.2, make sure to read the release notes for all the
  <a href="#v44_previous">previous versions</a> in between your version and
  this one, <strong>particularly the Upgrading section of each version's
  release notes</strong>.</p>

<h2 id="v44_point">Updates in this 4.4.x Release</h2>

<h3>4.4.1</h3>

<p>This release fixes several security issues. See the
  <a href="http://www.bugzilla.org/security/4.0.10/">Security Advisory</a>
  for details.</p>

<p>In addition, the following [% terms.bugs %] have been fixed in this release:</p>

<ul>
  <li><kbd>checksetup.pl</kbd> no longer fails with "Invalid version format (non-numeric data)"
    when a Perl module contains an invalid version number.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=781672">[% terms.Bug %] 781672</a>)</li>
  <li>Internet Explorer 11 and KHTML-based browsers such as Konqueror can now
    display buglists correctly.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=902515">[% terms.Bug %] 902515</a> and
    <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=914262">[% terms.bug %] 914262</a>)</li>
  <li>When editing several [% terms.bugs %] at once and moving them into a new
    product, [% terms.bugs %] restricted to a group in the old product could
    loose these group restrictions in the new product.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=769134">[% terms.Bug %] 769134</a>)</li>
  <li>When the <kbd>password_complexity</kbd> parameter was set to
    'letters_numbers_specialchars', passwords containing numbers and special
    characters only were accepted. Now it makes sure that a letter is also present.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=897264">[% terms.Bug %] 897264</a>)</li>
  <li>Large dependency trees are now displayed much faster.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=917370">[% terms.Bug %] 917370</a>)</li>
  <li>When a user has set many votes, the "Votes" page is now displayed much faster.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=851267">[% terms.Bug %] 851267</a>)</li>
  <li>The "My Requests" page now correctly uses the AND/OR operator for the
    requester and requestee fields only instead of using it for all fields.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=891311">[% terms.Bug %] 891311</a>)</li>
  <li>With DB servers doing case-insensitive comparisons, such as MySQL, tokens
    and login cookies were not correctly validated as the case was ignored.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=906745">[% terms.Bug %] 906745</a> and
    <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=907438">[% terms.bug %] 907438</a>)</li>
  <li>All security headers (such as X-Frame-Options) are now returned when using XML-RPC.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=787328">[% terms.Bug %] 787328</a>)</li>
  <li>Oracle crashed when reporting a new [% terms.bug %] if a custom free-text field
    was non-mandatory and left empty.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=919475">[% terms.Bug %] 919475</a>)</li>
  <li>It was not possible to import [% terms.bugs %] using <kbd>importxml.pl</kbd> with Oracle.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=848063">[% terms.Bug %] 848063</a>)</li>
</ul>

<h2 id="v44_req">Minimum Requirements</h2>

<p>Any requirements that are new since 4.2 will look like
  <span class="req_new">this</span>.</p>

<ul>
  <li><a href="#v44_req_perl">Perl</a></li>
  <li><a href="#v44_req_mysql">For MySQL Users</a></li>
  <li><a href="#v44_req_pg">For PostgreSQL Users</a></li>
  <li><a href="#v44_req_oracle">For Oracle Users</a></li>
  <li><a href="#v44_req_sqlite">For SQLite Users</a></li>
  <li><a href="#v44_req_modules">Required Perl Modules</a></li>
  <li><a href="#v44_req_optional_mod">Optional Perl Modules</a></li>
  <li><a href="#v44_req_apache">Optional Apache Modules</a></li>
</ul>

<h3 id="v44_req_perl">Perl</h3>

<p>Perl v5.8.1</p>

<p><strong>IMPORTANT:</strong> This is the last major release to support
  Perl 5.8.x! The next major release, Bugzilla 5.0, will require
  Perl 5.10.1 as a minimum.</p>

[% INCLUDE db_req db='mysql' %]

[% INCLUDE db_req db='pg' dbd_new => 1 %]

[% INCLUDE db_req db='oracle' %]

[% INCLUDE db_req db='sqlite' %]

<h3 id="v44_req_modules">Required Perl Modules</h3>

[% INCLUDE req_table reqs = REQUIRED_MODULES
                     updated = ['TimeDate', 'DBI', 'Email-Send', 'List-MoreUtils'] %]

<h3 id="v44_req_optional_mod">Optional Perl Modules</h3>

<p>The following perl modules, if installed, enable various
  features of Bugzilla:</p>

[% INCLUDE req_table reqs = OPTIONAL_MODULES
                     new  = ['Net-SMTP-SSL', 'HTML-FormatText-WithLinks',
                             'File-MimeInfo', 'IO-stringy']
                     updated = ['TheSchwartz']
                     include_feature = 1 %]

<h3 id="v44_req_apache">Optional Apache Modules</h3>

<p>If you are using Apache as your webserver, Bugzilla can
  take advantage of some Apache features if you have the below Apache
  modules installed and enabled. Currently,
  <a href="#v40_feat_js_css_update">certain Bugzilla features</a>
  are enabled only if you have all of the following modules installed
  and enabled:</p>

<ul>
  <li>mod_headers</li>
  <li>mod_expires</li>
  <li>mod_env</li>
</ul>

<p>On most systems (but not on Windows), <kbd>checksetup.pl</kbd> is able to
  tell whether or not you have these modules installed, and it will tell
  you.</p>


<h2 id="v44_feat">New Features and Improvements</h2>

<ul>
  <li><a href="#v44_feat_search">Allow Multiple Search Criteria to Match one Field</a></li>
  <li><a href="#v44_feat_search_perf">Improved Performance for Searches</a></li>
  <li><a href="#v44_feat_bug_tags">Overhaul of the Tagging System</a></li>
  <li><a href="#v44_feat_mimetype_autodetect">Auto-Detection of the Attachment MIME Type</a></li>
  <li><a href="#v44_feat_saved_reports">Saving Tabular and Graphical Reports</a></li>
  <li><a href="#v44_feat_whining">Custom Columns in Whine Emails</a></li>
  <li><a href="#v44_feat_webservices">Improved WebServices</a></li>
  <li><a href="#v44_feat_apache_config">New Apache Configuration</a></li>
  <li><a href="#v44_feat_other">Other Enhancements and Changes</a></li>
</ul>

<h3 id="v44_feat_search">Allow Multiple Search Criteria to Match one Field</h3>

<p>
  In the "Advanced Search" page, it is now possible to build queries using
  multiple custom search criteria against the same field. In Bugzilla
  4.2 and older, queries of the form
  <br><br>
  <kbd>"Status changed to VERIFIED" AND "Status changed by foo@bar.com"</kbd>
  <br><br>
  were returning all [% terms.bugs %] which had their status changed to VERIFIED
  by some user and which were edited by foo@bar.com once, but both actions could
  be independent. In Bugzilla 4.4, you can now decide if both
  criteria must match the exact same action or not, i.e. if you want
  [%+ terms.bugs %] whose status has been set to VERIFIED by foo@bar.com himself.
  In the same way, queries of the form
  <br><br>
  <kbd>"Flags changed to approval+" AND "Flags changed by foo@bar.com"</kbd>
  <br><br>
  can now return [% terms.bugs %] for which the approval flag has been set to
  "+" by foo@bar.com himself. In previous versions, both actions were treated
  independently and [% terms.bugs %] for which foo@bar.com set the approval flag
  to "?" and which is then set to "+" by someone else were also returned.
</p>
<p>
  This new feature gives you the ability to build more accurate queries and to
  get more relevant results.
</p>

<h3 id="v44_feat_search_perf">Improved Performance for Searches</h3>

<p>
  The search system got a performance boost which in some cases decreases the
  time spent to run queries from several minutes to a few seconds only.
  The more complex your queries are, the more visible the performance win
  should be.
</p>

<h3 id="v44_feat_bug_tags">Overhaul of the Tagging System</h3>

<p>
  The old tagging system which was in the footer of all pages had severe design
  and usability limitations and has been replaced by a shiny new one which lets
  you tag [% terms.bugs %] from the [% terms.bug %] report directly. Tags now
  mostly work like keywords, but with two major differences. First of all, they
  are personal, meaning that tags you set on [% terms.bugs %] are only visible
  by you, and nobody else is notified nor can see which tags you set. This
  behavior is the same as the old tagging system and so this feature didn't
  change. The second major difference is that the list of available tags is
  unlimited and is in no way hardcoded by administrators. You can type either
  a new tag of your choice, or you can select one from an auto-generated list
  of tags which you already used in other [% terms.bugs %]. Again, this feature
  was already present in the old tagging system, but its usability has been
  greatly improved. In particular, this means that tags are now displayed in
  [%+ terms.bug %] reports directly, so that you immediately know which tags
  you already set for that [% terms.bug %]. This feature is new in this release.
</p>
<p>
  Another new feature is that your personal tags can now be listed in buglists.
  They can also be used as search criteria in your queries. If you decide to
  share a saved search which uses tags as criteria, this will work too! Note
  that when you add a new tag, no saved search based on this tag is created
  anymore, as you can easily create it yourself if you really need it.
</p>
<p>
  The tags set with the old tagging system are automatically migrated to the
  new system.
</p>

<h3 id="v44_feat_mimetype_autodetect">Auto-Detection of the Attachment MIME Type</h3>

<p>
  When a user uploads a new attachment and lets the "Content Type" field set to
  "auto-detect", Bugzilla now does its own MIME type detection
  if the web browser tells him that the attachment is of type
  "application/octet-stream", in an attempt to make a better guess than the web
  browser. In all other cases, Bugzilla still trusts what the browser
  tells him.
</p>
<p>
  Check the <a href="#v44_req_optional_mod">list of optional Perl modules</a> to
  know which modules to install in order to enable MIME type sniffing.
</p>

<h3 id="v44_feat_saved_reports">Saving Tabular and Graphical Reports</h3>

<p>
  It is now possible to save tabular and graphical reports in the same way as
  you save searches. Saved reports will appear in the footer of pages, below
  saved searches.
</p>
<p>
  Unlike saved searches, it is not yet possible to share saved reports with
  other users.
</p>

<h3 id="v44_feat_whining">Custom Columns in Whine Emails</h3>

<p>
  The list of columns to display in buglists contained in emails sent by the
  whining system on a regular basis is no longer hardcoded. If the saved
  search used for whining emails contains a list of columns, these columns are
  used to be displayed in the emails. If no custom list is found, the default
  column list is used instead.
</p>
<p>
  This means that depending on the kind of email notifications you want, you
  can fully customize data to return, on a per saved search basis!
</p>

<h3 id="v44_feat_webservices">Improved WebServices</h3>

<p>
  This release got major improvements in its WebServices interface. Many new
  methods have been implemented to let third-party applications interact with
  Bugzilla even more closely. For instance, it is now possible to
  know what parameters are set to using <kbd>B[%%]ugzilla.parameters</kbd>.
  It is now also possible to update tags, products, groups or user accounts
  using our API.
<p>
<p>
  Several existing methods have also been improved to return data which
  weren't available till now, such as [% terms.bug %] and attachment flags
  using <kbd>B[%%]ug.get</kbd>, <kbd>B[%%]ug.attachments</kbd> or
  <kbd>Product.get</kbd>. Users can also get their saved searches and reports
  using <kbd>User.get</kbd>; and much more, see the
  <a href="#v44_feat_webservices_details">detailed list</a> below.
</p>

<h3 id="v44_feat_apache_config">New Apache Configuration</h3>

<p>
  For improved security, Bugzilla now prevents directory browsing
  by default. If you run Bugzilla under Apache (as most people do),
  you most likely require a <strong>new Apache configuration</strong> for this
  version of Bugzilla. See the
  <a href="#v44_upgrading">Notes On Upgrading From a Previous Version</a>
  section for details.
</p>

<h3 id="v44_feat_other">Other Enhancements and Changes</h3>

<h4>Enhancements for Users</h4>

<ul>
  <li><strong>[% terms.Bugs %]:</strong> It is now possible to add yourself to
    the CC list when uploading an attachment and when editing an existing one.</li>
  <li><strong>[% terms.Bugs %]:</strong> There is a new user preference to be
    automatically added to the CC list of [% terms.bugs %] for which a flag
    request is addressed to you (the flag has you as the requestee).</li>
  <li><strong>[% terms.Bugs %]:</strong> Changes to the CC list no longer
    causes midair collisions.</li>
  <li><strong>[% terms.Bugs %]:</strong> There is now a <em>(take)</em> link
    besides the QA Contact field to easily set yourself as QA contact.</li>
  <li><strong>[% terms.Bugs %]:</strong> [% terms.Bugs %] are no longer
    reassigned to the default assignee when moving the [% terms.bug %] into
    another product or component if the current assignee is not the default
    one. Same goes for the QA contact.</li>
  <li><strong>[% terms.Bugs %]:</strong> When reporting a new [% terms.bug %],
    flags which are not available for the selected component and those which
    the reporter cannot edit are now hidden instead of being disabled. For
    existing [% terms.bugs %], unset flags are also hidden by default. Clicking
    the <em>(set flags)</em> or <em>(more flags)</em> link will make them
    appear.</li>
  <li><strong>[% terms.Bugs %]:</strong> When viewing [% terms.abug %], the list
    of duplicated [% terms.bugs %] is now listed near the top of the page.</li>
  <li><strong>[% terms.Bugs %]:</strong> Private comments now always remain
    visible to their author. Previously, the author of a comment couldn't see
    it anymore if the comment was marked private and the author isn't in the
    insider group.</li>
  <li><strong>[% terms.Bugs %]:</strong> The See Also field now supports URLs
    pointing to GitHub by default. If the new MoreBugUrl extension included in
    this release is enabled, then you can also add URLs pointing to:
    b[%%]ugs.php.net, RT, appspot.com (Rietveld), Review Board, and
    getsatisfaction.com.</li>
  <li><strong>Searches:</strong> The alias of [% terms.bugs %] you cannot see
    are no longer resolved to their [% terms.bug %] ID, meaning that it is no
    longer possible to connect an alias with its ID unless you can see the
    [%+ terms.bug %].</li>
  <li><strong>Searches:</strong> Custom multi-select fields are now available
    in the "Search By Change History" section of the query page.</li>
  <li><strong>Searches:</strong> The <em>changed by</em> operator in boolean
    charts now accepts pronouns.</li>
  <li><strong>Searches:</strong> The requester and requestee fields in boolean
    charts now accept pronouns.</li>
  <li><strong>Searches:</strong> It is now possible to hide the description of
    queries appearing at the top of buglists.</li>
  <li><strong>Requests:</strong> The "My Requests" page now displays an AND/OR
    radio button to define the interaction between the requester and requestee
    fields.</li>
  <li><strong>Email Notifications:</strong> There is a new user preference to
    not prepend "New:" to the subject of [% terms.bug %]mails when reporting
    a new [% terms.bug %]. Some email clients couldn't thread emails correctly
    due to this.</li>
  <li><strong>Email Notifications:</strong> There is a new email event to get
    notifications when the product or component of [% terms.abug %] changes.</li>
  <li><strong>Email Notifications:</strong> All [% terms.bug %]mails now have
    a <em>X-Bugzilla-Flags</em> email header, listing currently set flags.</li>
  <li><strong>Email Notifications:</strong> All [% terms.bug %]mails now have
    a <em>X-Bugzilla-Version</em> email header with the current product
    version.</li>
  <li><strong>Whining:</strong> The sort order of the saved search is used to
    sort [% terms.bugs %] in the emails.</li>
  <li><strong>User Accounts:</strong> To confirm an email address change, the
    password is now requested instead of the old email address.</li>
  <li><strong>Graphical Reports:</strong> The size of graphical reports is now
    set dynamically to fit within the window of the web browser.
    The Taller/Thinner/Fatter/Shorter links are now gone.</li>
  <li><strong>Incoming Emails:</strong> <kbd>email_in.pl</kbd> now accepts
    HTML-only emails to create and edit [% terms.bugs %] by email.</li>
  <li><strong>Incoming Emails:</strong> When creating a new [% terms.bug %],
    <kbd>email_in.pl</kbd> will look at the <em>Importance</em> and
    <em>X-Priority</em> email headers to increase or decrease the initial
    priority of the [% terms.bug %], unless the priority is already explicitly
    set in the email itself.</li>
  <li><strong>Skins:</strong> Bugzilla no longer fetches all skins
    available when viewing a page. It only loads the skin selected by the user
    in his preferences, which results in less requests to the server.</li>
</ul>

<h4>Enhancements for Administrators and Developers</h4>

<ul>
  <li><strong>License:</strong> The Bugzilla code is now released
    under the MPL 2.0 license (previously was MPL 1.1).</li>
  <li><strong>Installation:</strong> On mod_perl, templates now remain in
    memory for one hour, which can cause an increase in memory requirements.
    This also means that it can take up to one hour before changes in templates
    become active (unless you restart Apache).</li>
  <li><strong>Installation:</strong> Running
    <kbd>checksetup.pl --make-admin=foo@bar.com</kbd> now automatically
    re-enables the user account if it was disabled.</li>
  <li><strong>Configuration:</strong> A new parameter <em>smtp_ssl</em> can be
    turned on to enable SSL connections to the SMTP server to send email
    notifications.</li>
  <li><strong>Administration:</strong> Custom fields now have a new <em>Long
    description</em> attribute to better describe what the custom field is
    about. This description then appears as a tooltip when hovering the custom
    field in [% terms.bug %] reports.</li>
  <li><strong>Administration:</strong> When creating a new product, the form
    lets you add a component at the same time.</li>
  <li><strong>Administration:</strong> When viewing a user account in
    <kbd>editusers.cgi</kbd>, the date of the last login is displayed. Users
    who did not log in since you upgraded to 4.4 will have this field empty.</li>
  <li><strong>Administration:</strong> It is now possible to exclude disabled
    user accounts when running a query in <kbd>editusers.cgi</kbd>.</li>
  <li><strong>Administration:</strong> The default CC list is now also displayed
    when listing components in <kbd>editcomponents.cgi</kbd>.</li>
  <li><strong>Administration:</strong> Target milestones can now be 64 characters
    long, for consistency with versions (previously was limited to 20 characters
    only).</li>
  <li><strong>Administration:</strong> The result code returned by
    <kbd>contrib/bugzilla-queue.rhel</kbd> when it's not running is now 2
    instead of 0.</li>
  <li><strong>Database:</strong> Support for MySQL 5.6 has been added.</li>
  <li><strong>Database:</strong> Support for Oracle has been greatly improved.</li>
  <li><strong>Security:</strong> For improved security, the
    "X-Content-Type-Options:&nbsp;nosniff" and "X-XSS-Protection:&nbsp;block"
    headers are now sent with every response.</li>
  <li><strong>Security:</strong> Tokens are now generated using HMAC SHA-256
    instead of MD5.</li>
  <li><strong>Documentation:</strong> The documentation is now generated with
    <kbd>xmlto</kbd> and <kbd>dblatex</kbd> instead of <kbd>jade</kbd>.</li>
</ul>

<h4 id="v44_feat_webservices_details">WebService Changes</h4>

<ul>
  <li>Several new methods have been added: <kbd>B[%%]ug.update_tags</kbd>,
    <kbd>B[%%]ugzilla.parameters</kbd>, <kbd>B[%%]ugzilla.last_audit_time</kbd>,
    <kbd>Classification.get</kbd>, <kbd>Group.update</kbd>,
    <kbd>Product.update</kbd>, <kbd>User.update</kbd>.</li>
  <li><kbd>B[%%]ug.add_attachment</kbd> now only returns the ID of the newly
    created attachments instead of all the attachment data.</li>
  <li><kbd>B[%%]ug.attachments</kbd> now also returns the <kbd>size</kbd> field
    containing the size of the attachment.</li>
  <li><kbd>B[%%]ug.attachments</kbd> and <kbd>B[%%]ug.get</kbd> now return
    data about flags.</li>
  <li><kbd>B[%%]ug.comments</kbd> now also returns <kbd>creation_time</kbd>
    which is exactly the same as <kbd>time</kbd>, but is provided for
    consistency with <kbd>B[%%]ug.get</kbd> and <kbd>B[%%]ug.attachments</kbd>.
    The <kbd>time</kbd> field may be deprecated and removed in a future release,
    so you should use <kbd>creation_time</kbd> instead.</li>
  <li><kbd>B[%%]ug.comments</kbd> now also returns the <kbd>count</kbd> field
    containing the comment ID relative to the [% terms.bug %] it belongs to.
    This is the same comment ID as the one you can see in [% terms.bug %]
    reports.</li>
  <li>It is now possible to create new [% terms.bugs %] with a closed status with
    <kbd>B[%%]ug.create</kbd>.</li>
  <li>The <kbd>bug_status</kbd> field returned by <kbd>B[%%]ug.fields</kbd> now
    also includes [% terms.bug %] statuses available on [% terms.bug %] creation.</li>
  <li><kbd>B[%%]ug.fields</kbd> now also returns keyword descriptions, not only
    their names.</li>
  <li><kbd>B[%%]ug.fields</kbd> now also returns the <kbd>is_active</kbd> field
    for product-specific fields.</li>
  <li>For users in the timetracking group, <kbd>B[%%]ug.get</kbd> now also
    returns the <kbd>actual_time</kbd> field with the total number of hours
    spent in the [% terms.bug %].</li>
  <li>Field names returned in the <kbd>field_name</kbd> field of the
    <kbd>B[%%]ug.history</kbd> method have changed to be consistent with other
    methods.</li>
  <li>The <kbd>B[%%]ug.search</kbd> method was returning all visible [% terms.bugs %]
    when called with no arguments, ignoring the <kbd>max_search_results</kbd>
    and <kbd>search_allow_no_criteria</kbd> parameters. This has been fixed.</li>
  <li><kbd>Product.get</kbd> now also returns the <kbd>flag_types</kbd> field
    containing all the relevant data for attachment and [% terms.bug %] flag types.</li>
  <li><kbd>Product.get</kbd> now throws an error if neither <kbd>ids</kbd> nor
    <kbd>names</kbd> is passed to the method.</li>
  <li>When requesting data for your own account using <kbd>User.get</kbd>,
    this method now returns two additional fields: <kbd>saved_searches</kbd>
    and <kbd>saved_reports</kbd> containing all your saved searches and
    graphical and tabular reports.</li>
  <li><kbd>User.get</kbd> now also returns the <kbd>groups</kbd> field
    containing the list of groups the user belongs to. The list is filtered
    based on your privileges.</li>
</ul>


<h2 id="v44_issues">Outstanding Issues</h2>

<ul>
  <li><a href="https://bugzilla.mozilla.org/show_bug.cgi?id=89822">
    [%- terms.Bug %] 89822</a>: When changing multiple [% terms.bugs %] at
    the same time, there is no "mid-air collision" protection.</li>
  <li><a href="https://bugzilla.mozilla.org/show_bug.cgi?id=276230">
    [%- terms.Bug %] 276230</a>: The support for restricting access to
    particular Categories of New Charts is not complete. You should treat the
    <em>chartgroup</em> parameter as the only access mechanism available.</li>
  <li><a href="https://bugzilla.mozilla.org/show_bug.cgi?id=584742">
    [%- terms.Bug %] 584742</a>: When viewing [% terms.abug %], WebKit-based
    browsers can automatically reset a field's selected value when the field
    has disabled values.</li>
</ul>


<h2 id="v44_upgrading">Notes On Upgrading From a Previous Version</h2>

<h3>IMPORTANT: Apache Configuration Change</h3>

<p>
  For improved security, Bugzilla now prevents directory browsing
  by default. In order to do that, the root <kbd>bugzilla/.htaccess</kbd> file
  now contains the <kbd>Options -Indexes</kbd> directive. By default, this
  directive is not allowed in <kbd>.htaccess</kbd> and so you must configure
  Apache to allow it. To do that, add <kbd>Options</kbd> to the
  <kbd>AllowOverride</kbd> directive in <kbd>httpd.conf</kbd>. This means you
  should now have something like this:
  <p>
    <kbd>AllowOverride Limit FileInfo Indexes Options</kbd>
  </p>
  Check the
  <a href="http://www.bugzilla.org/docs/4.4/en/html/configuration.html#http-apache">documentation</a>
  for more information about how to configure Apache.
</p>

<h2 id="v44_code_changes">Code Changes Which May Affect Customizations and Extensions</h2>

<ul>
  <li>The <em>usebugaliases</em> parameter has been removed. Aliases are now
    always available.</li>
  <li>There is a new code hook <kbd>admin_editusers_action</kbd> to alter the
    way <kbd>editusers.cgi</kbd> works.</li>
  <li>There is a new code hook <kbd>buglist_column_joins</kbd> to alter the way
    tables and columns are joined in queries. In combination with the
    <kbd>buglist_columns</kbd> hook, this permits to customize the list of
    columns to display in buglists.</li>
  <li>There is a new code hook <kbd>bug_start_of_update</kbd> which is called
    after <kbd>object_end_of_update</kbd> but before <kbd>bug_end_of_update</kbd>
    for a better control on how to update [% terms.bugs %].</li>
  <li>There is a new code hook <kbd>bug_url_sub_classes</kbd> to support
    additional URLs in the See Also field.</li>
  <li>There is a new code hook <kbd>error_catch</kbd> to catch errors thrown
    by Bugzilla and to take the appropriate actions.</li>
  <li>There is a new code hook <kbd>path_info_whitelist</kbd> to whitelist
    scripts which should still get the Path-Info information from URLs. By
    default, Path-Info is now removed before being passed to CGI scripts.</li>
  <li>It is now illegal to have a product with no components and no versions.
    Trying to delete the last component or version of a product is now
    rejected.</li>
  <li>Trying to set the component, target milestone or version of [% terms.abug %]
    to a disabled value is no longer accepted. The change will be rejected.</li>
  <li>The comment box now checks the returned value of check_can_change_field()
    to determine if it should be displayed or not. This means its visibility
    can now be controlled by the <kbd>bug_check_can_change_field</kbd> hook.</li>
  <li>Flags now checks the returned value of check_can_change_field() to
    determine if they should appear as editable or not. This means their
    visibility can now be controlled by the <kbd>bug_check_can_change_field</kbd>
    hook.</li>
  <li>Quips can no longer exceed 512 characters. Existing quips longer than
    that are automatically truncated when upgrading.</li>
  <li>The static <kbd>bugzilla.dtd</kbd> file has been replaced by a dynamic
    one to take custom fields into account. The old
    <em>&lt;urlbase&gt;/bugzilla.dtd</em> URL is now
    <em>&lt;urlbase&gt;/page.cgi?id=bugzilla.dtd</em>.</li>
  <li>There is a new extension located at <kbd>extensions/MoreBugUrl/</kbd>
    which permits to add new classes of URLs in the See Also field. It uses
    the <kbd>bug_url_sub_classes</kbd> hook mentioned above.</li>
  <li>There is a new <kbd>B[%%]ugzilla->process_cache</kbd> method to store
    data which should remain available for the lifetime of the worker process,
    on mod_perl. On mod_cgi, it behaves the same way as
    <kbd>B[%%]ugzilla->request_cache</kbd>.</li>
  <li>In the RDF output of <kbd>config.cgi</kbd>, URIs used to identify
    versions and target milestones have been changed to be unique across
    products.</li>
  <li>The RDF output of <kbd>config.cgi</kbd> now also returns data about
    classifications.</li>
  <li>It is now legal to call <kbd>B[%%]ugzilla::Version->check({ id => $id })</kbd>
    and <kbd>B[%%]ugzilla::Milestone->check({ id => $id })</kbd> to validate
    and get an object using its ID.</li>
  <li>Rows in the <kbd>dependencies</kbd>, <kbd>flaginclusions</kbd> and
    <kbd>flagexclusions</kbd> DB tables are now enforced to be unique.</li>
  <li>The <kbd>b[%%]ugs_activity</kbd> and <kbd>profiles_activity</kbd> DB
    tables now have an auto-incremented primary key named <kbd>id</kbd>.</li>
  <li>A custom <kbd>B[%%]ugzilla.pm</kbd> module has been added into
    <kbd>contrib/</kbd> to help packagers to package B[%%]ugzilla in their
    Linux distros.</li>
</ul>


<h1 id="v44_previous">Bugzilla 4.2 Release Notes</h1>

<ul class="bz_toc">
  <li><a href="#v42_introduction">Introduction</a></li>
  <li><a href="#v42_point">Updates in this 4.2.x Release</a></li>
  <li><a href="#v42_req">Minimum Requirements</a></li>
  <li><a href="#v42_feat">New Features and Improvements</a></li>
  <li><a href="#v42_issues">Outstanding Issues</a></li>
  <li><a href="#v42_code_changes">Code Changes Which May Affect
    Customizations and Extensions</a></li>
  <li><a href="#v42_previous">Release Notes for Previous Versions</a></li>
</ul>

<h2 id="v42_introduction">Introduction</h2>

<p>Welcome to Bugzilla 4.2! It has been almost a year since we
  released Bugzilla 4.0 on February 2011, and this new major
  release comes with several new features and improvements. This release
  contains major improvements to search, support for SQLite, improved
  WebServices, and lots of other enhancements.</p>

<p>If you are upgrading from a release before 4.0, make sure to read the
  release notes for all the <a href="#v42_previous">previous versions</a>
  in between your version and this one, <strong>particularly the Upgrading
  section of each version's release notes</strong>.</p>

<h2 id="v42_point">Updates in this 4.2.x Release</h2>

<h3>4.2.3</h3>

<p>This release fixes two security issues. See the
  <a href="http://www.bugzilla.org/security/3.6.10/">Security Advisory</a>
  for details.</p>

<p>In addition, the following important fixes/changes have been made in this
  release:</p>

<ul>
  <li>Attaching a file to [% terms.abug %] was broken due to a change in
    Perl 5.16.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=771100">[% terms.Bug %] 771100</a>)</li>
  <li>A regression in Bugzilla 4.2.2 made Oracle crash when
    displaying a buglist.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=780028">[% terms.Bug %] 780028</a>)</li>
  <li>It was possible to search on history for comments and attachments you
    cannot see (though these private comments and attachments are never disclosed).
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=779709">[% terms.Bug %] 779709</a>)</li>
  <li>PostgreSQL databases could be created with the wrong encoding despite
    the utf8 parameter being enabled.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=783786">[% terms.Bug %] 783786</a>)</li>
  <li>Scheduled whines could be sent at the wrong time on Oracle.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=559539">[% terms.Bug %] 559539</a>)</li>
  <li>Tokens are no longer included in saved queries.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=772953">[% terms.Bug %] 772953</a>)</li>
  <li>An admin could unintentionally break the display of buglists if a custom
    field description contains a &lt; or &gt; character, because these characters
    were not filtered.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=785917">[% terms.Bug %] 785917</a>)</li>
  <li>Adding or removing a DB column in Oracle didn't handle SERIAL columns
    correctly.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=731156">[% terms.Bug %] 731156</a>)</li>
  <li>A minor CSRF vulnerability in token.cgi allowed possible unauthorized
    password reset e-mail requests.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=706271">[% terms.Bug %] 706271</a>)</li>
</ul>

<h3>4.2.2</h3>

<p>This release fixes two security issues. See the
  <a href="http://www.bugzilla.org/security/3.6.9/">Security Advisory</a>
  for details.</p>

<p>In addition, the following important fixes/changes have been made in this
  release:</p>

<ul>
  <li>A regression introduced in Bugzilla 4.0 caused some login
    names to be ignored when entered in the CC list of [% terms.bugs %].
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=756314">[% terms.Bug %] 756314</a>)</li>
  <li>Some queries could trigger an invalid SQL query if strings entered by
    the user contained leading or trailing whitespaces.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=760075">[% terms.Bug %] 760075</a>)</li>
  <li>The auto-completion form for keywords no longer automatically selects
    the first keyword in the list when the field is empty.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=764517">[% terms.Bug %] 764517</a>)</li>
  <li>A regression in Bugzilla 4.2 prevented classifications
    from being used in graphical and tabular reports in the "Multiple Tables"
    field.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=753688">[% terms.Bug %] 753688</a>)</li>
  <li>Attachments created by the <kbd>email_in.pl</kbd> script were associated
    to the wrong comment.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=762785">[% terms.Bug %] 762785</a>)</li>
  <li>Very long dependency lists can now be viewed correctly.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=762783">[% terms.Bug %] 762783</a>)</li>
  <li>Keywords are now correctly escaped in the auto-completion form to prevent
    any XSS abuse.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=754561">[% terms.Bug %] 754561</a>)</li>
  <li>A regression introduced in Bugzilla 4.0rc2 when fixing
    CVE-2011-0046 caused the "Un-forget the search" link to not work correctly
    anymore when restoring a deleted saved search, because this link was
    lacking a valid token.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=768870">[% terms.Bug %] 768870</a>)</li>
  <li>Two minor CSRF vulnerabilities have been fixed which could let an attacker
    alter your default search criteria in the Advanced Search page.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=754672">[% terms.Bugs %] 754672</a>
    and <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=754673">754673</a>)</li>
</ul>

<h3>4.2.1</h3>

<p>This release fixes one security issue. See the
  <a href="http://www.bugzilla.org/security/3.6.8/">Security Advisory</a>
  for details.</p>

<p>In addition, the following important fixes/changes have been made in this
  release:</p>

<ul>
  <li>Due to a regression introduced when fixing CVE-2012-0453, if an XML-RPC
    client sets the charset as part of its Content-Type header, we were
    incorrectly rejecting the request. The header is now correctly parsed.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=731219">[% terms.Bug %] 731219</a>)</li>
  <li>Email notifications about status changes in blockers were incorrectly
    formatted. Several pieces of text were missing in the emails.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=731586">[% terms.Bug %] 731586</a>)</li>
  <li>Many [% terms.bugs %] related to the searching system have been fixed.
    (<a href="https://bugzilla.mozilla.org/buglist.cgi?bug_id=58179,715270,730984,731163,737436">
    [% terms.Bugs %] 58179, 715270, 730984, 731163 and 737436</a>)</li>
  <li>When using the QuickSearch box, complex queries are now parsed correctly.
    It also behaves correctly with non-ASCII characters (such as é, ä, ü, etc.).
    (<a href="https://bugzilla.mozilla.org/buglist.cgi?bug_id=554819,663377,730207">
    [% terms.Bugs %] 554819, 663377 and 730207</a>)</li>
  <li>The 'take' link besides the assignee field now works correctly when
    the <kbd>usemenuforusers</kbd> parameter is turned on.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=734997">[% terms.Bug %] 734997</a>)</li>
  <li>URLs in the 'Total' row at the bottom of tabular reports were broken
    when JavaScript was enabled and a user field was used for the vertical
    axis.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=731323">[% terms.Bug %] 731323</a>)</li>
  <li>Some performance problems have been fixed for installations with many
    products, components or versions.
    (<a href="https://bugzilla.mozilla.org/buglist.cgi?bug_id=695514,731055">
    [% terms.Bugs %] 695514 and 731055</a>)</li>
  <li>A new hook named <kbd>buglist_column_joins</kbd> has been added to let
    extensions alter the <kbd>Bugzilla::Search::COLUMN_JOINS</kbd> hash.
    Now more fields can be displayed as columns in buglists, in combination
    with the already existing <kbd>buglist_columns</kbd> hook.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=743991">[% terms.Bug %] 743991</a>)</li>
  <li>A new hook named <kbd>admin_editusers_action</kbd> has been added to let
    extensions alter the behavior of <kbd>editusers.cgi</kbd>. This lets you add
    new features to this script very easily.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=730794">[% terms.Bug %] 730794</a>)</li>
</ul>

<h2 id="v42_req">Minimum Requirements</h2>

<p>Any requirements that are new since 4.0.2 will look like
  <span class="req_new">this</span>.</p>

<ul>
  <li><a href="#v42_req_perl">Perl</a></li>
  <li><a href="#v42_req_mysql">For MySQL Users</a></li>
  <li><a href="#v42_req_pg">For PostgreSQL Users</a></li>
  <li><a href="#v42_req_oracle">For Oracle Users</a></li>
  <li><a href="#v42_req_sqlite">For SQLite Users</a></li>
  <li><a href="#v42_req_modules">Required Perl Modules</a></li>
  <li><a href="#v42_req_optional_mod">Optional Perl Modules</a></li>
  <li><a href="#v42_req_apache">Optional Apache Modules</a></li>
</ul>

<h3 id="v42_req_perl">Perl</h3>

<p>Perl v5.8.1</p>

<h3 id="v42_req_mysql">For MySQL Users</h3>

<ul>
  <li>MySQL <span class="req_new">v5.0.15</span></li>
  <li><strong>perl module:</strong> DBD::mysql <span class="req_new">v4.001</span></li>
</ul>

<h3 id="v42_req_pg">For PostgreSQL Users</h3>

<ul>
  <li>PostgreSQL <span class="req_new">v8.03.0000</span></li>
  <li><strong>perl module:</strong> DBD::Pg v1.45</li>
</ul>

<h3 id="v42_req_oracle">For Oracle Users</h3>

<ul>
  <li>Oracle v10.02.0</li>
  <li><strong>perl module:</strong> DBD::Oracle v1.19</li>
</ul>

<h3 id="v42_req_sqlite">For SQLite Users</h3>

<ul>
  <li>SQLite v3.6.22</li>
  <li><strong>perl module:</strong> DBD::SQLite v1.29</li>
</ul>

<h3 id="v42_req_modules">Required Perl Modules</h3>


<table class="req_table">
  <tbody>
      <tr>
        <th>Module</th>
        <th>Version</th>
      </tr>
      <tr>
        <td>CGI</td>
        <td>3.51</td>
      </tr>
      <tr>
        <td>Digest::SHA</td>
        <td>(Any)</td>
      </tr>
      <tr>
        <td>Date::Format</td>
        <td>2.21</td>
      </tr>
      <tr>
        <td>DateTime</td>
        <td>0.28</td>
      </tr>
      <tr>
        <td>DateTime::TimeZone</td>
        <td>0.71</td>
      </tr>
      <tr>
        <td>DBI</td>
        <td>1.614</td>
      </tr>
      <tr>
        <td>Template</td>
        <td>2.22</td>
      </tr>
      <tr>
        <td>Email::Send</td>
        <td>2.00</td>
      </tr>
      <tr>
        <td>Email::MIME</td>
        <td>1.904</td>
      </tr>
      <tr>
        <td>URI</td>
        <td class="req_new">1.37</td>
      </tr>
      <tr>
        <td>List::MoreUtils</td>
        <td>0.22</td>
      </tr>
      <tr>
        <td class="req_new">Math::Random::ISAAC</td>
        <td class="req_new">1.0.1</td>
      </tr>
  </tbody>
</table>

<h3 id="v42_req_optional_mod">Optional Perl Modules</h3>

<p>The following perl modules, if installed, enable various
  features of Bugzilla:</p>


<table class="req_table">
  <tbody>
      <tr>
        <th>Module</th>
        <th>Version</th>
        <th>Enables Feature</th>
      </tr>
      <tr>
        <td>GD</td>
        <td>1.20</td>
        <td>Graphical Reports, New Charts, Old Charts</td>
      </tr>
      <tr>
        <td>Chart::Lines</td>
        <td>2.1</td>
        <td>New Charts, Old Charts</td>
      </tr>
      <tr>
        <td>Template::Plugin::GD::Image</td>
        <td>(Any)</td>
        <td>Graphical Reports</td>
      </tr>
      <tr>
        <td>GD::Text</td>
        <td>(Any)</td>
        <td>Graphical Reports</td>
      </tr>
      <tr>
        <td>GD::Graph</td>
        <td>(Any)</td>
        <td>Graphical Reports</td>
      </tr>
      <tr>
        <td>MIME::Parser</td>
        <td>5.406</td>
        <td>Move [% terms.Bugs %] Between Installations</td>
      </tr>
      <tr>
        <td>LWP::UserAgent</td>
        <td>(Any)</td>
        <td>Automatic Update Notifications</td>
      </tr>
      <tr>
        <td>XML::Twig</td>
        <td>(Any)</td>
        <td>Move [% terms.Bugs %] Between Installations, Automatic Update Notifications</td>
      </tr>
      <tr>
        <td>PatchReader</td>
        <td class="req_new">0.9.6</td>
        <td>Patch Viewer</td>
      </tr>
      <tr>
        <td>Net::LDAP</td>
        <td>(Any)</td>
        <td>LDAP Authentication</td>
      </tr>
      <tr>
        <td>Authen::SASL</td>
        <td>(Any)</td>
        <td>SMTP Authentication</td>
      </tr>
      <tr>
        <td>Authen::Radius</td>
        <td>(Any)</td>
        <td>RADIUS Authentication</td>
      </tr>
      <tr>
        <td>SOAP::Lite</td>
        <td>0.712</td>
        <td>XML-RPC Interface</td>
      </tr>
      <tr>
        <td>JSON::RPC</td>
        <td>(Any)</td>
        <td>JSON-RPC Interface</td>
      </tr>
      <tr>
        <td>JSON::XS</td>
        <td>2.0</td>
        <td>Make JSON-RPC Faster</td>
      </tr>
      <tr>
        <td>Test::Taint</td>
        <td>(Any)</td>
        <td>JSON-RPC Interface, XML-RPC Interface</td>
      </tr>
      <tr>
        <td>HTML::Parser</td>
        <td>3.67</td>
        <td>More HTML in Product/Group Descriptions</td>
      </tr>
      <tr>
        <td>HTML::Scrubber</td>
        <td>(Any)</td>
        <td>More HTML in Product/Group Descriptions</td>
      </tr>
      <tr>
        <td class="req_new">Encode</td>
        <td class="req_new">2.21</td>
        <td>Automatic charset detection for text attachments</td>
      </tr>
      <tr>
        <td class="req_new">Encode::Detect</td>
        <td class="req_new">(Any)</td>
        <td>Automatic charset detection for text attachments</td>
      </tr>
      <tr>
        <td>Email::MIME::Attachment::Stripper</td>
        <td>(Any)</td>
        <td>Inbound Email</td>
      </tr>
      <tr>
        <td>Email::Reply</td>
        <td>(Any)</td>
        <td>Inbound Email</td>
      </tr>
      <tr>
        <td>TheSchwartz</td>
        <td>(Any)</td>
        <td>Mail Queueing</td>
      </tr>
      <tr>
        <td>Daemon::Generic</td>
        <td>(Any)</td>
        <td>Mail Queueing</td>
      </tr>
      <tr>
        <td>mod_perl2</td>
        <td>1.999022</td>
        <td>mod_perl</td>
      </tr>
      <tr>
        <td>Apache2::SizeLimit</td>
        <td class="req_new">0.96</td>
        <td>mod_perl</td>
      </tr>
  </tbody>
</table>

<h3 id="v42_req_apache">Optional Apache Modules</h3>

<p>If you are using Apache as your webserver, Bugzilla can
  take advantage of some Apache features if you have the below Apache
  modules installed and enabled. Currently,
  <a href="#v40_feat_js_css_update">certain Bugzilla features</a>
  are enabled only if you have all of the following modules installed
  and enabled:</p>

<ul>
  <li>mod_headers</li>
  <li>mod_expires</li>
  <li>mod_env</li>
</ul>

<p>On most systems (but not on Windows), <kbd>checksetup.pl</kbd> is able to
  tell whether or not you have these modules installed, and it will tell
  you.</p>


<h2 id="v42_feat">New Features and Improvements</h2>

<ul>
  <li><a href="#v42_feat_sqlite">Experimental SQLite Support</a></li>
  <li><a href="#v42_feat_attach">Creating an Attachment by Pasting Text Into
    a Text Field</a></li>
  <li><a href="#v42_feat_email">HTML [% terms.Bug %]mail</a></li>
  <li><a href="#v42_feat_search">Improved Searching System</a></li>
  <li><a href="#v42_feat_product">Disabling Old Components, Versions and Milestones</a></li>
  <li><a href="#v42_feat_custom">Displaying a Custom Field Value Based on Multiple
    Values of Another Field</a></li>
  <li><a href="#v42_feat_audit">Auditing of All Changes Within Bugzilla</a></li>
  <li><a href="#v42_feat_wai">Accessibility Improvements</a></li>
  <li><a href="#v42_feat_other">Other Enhancements and Changes</a></li>
</ul>

<h3 id="v42_feat_sqlite">Experimental SQLite Support</h3>

<p>SQLite is now supported by Bugzilla and becomes the 4th supported
  database besides MySQL, PostgreSQL and Oracle. SQLite support must be considered
  as experimental, at least till the next major release.</p>

<p>Note that use of SQLite is only recommended for small installations. Larger
  installations should use MySQL, PostgreSQL, or Oracle.</p>

<h3 id="v42_feat_attach">Creating an Attachment by Pasting Text Into a Text Field</h3>

<p>You can now create a new attachment simply by pasting some text into a text
  field, in addition to the normal upload process for attachments.</p>

<h3 id="v42_feat_email">HTML [% terms.Bug %]mail</h3>

<p>By default, [% terms.bug %]mails (email notifications about changes to
  [%+ terms.bugs %]) are now sent in an HTML format that is more readable than
  the old text format. Those who prefer the old text format can still choose it
  in their Preferences, however.</p>

<h3 id="v42_feat_search">Improved Searching System</h3>

<p>The Custom Search section in the Advanced Search page has been redesigned
  to work in a more sensible way. Complex queries are easier to build and have
  more sensible results, as they are built using a more intuitive logic.
  Some very complicated queries are still impossible to generate, though.
  Things should improve in future releases.</p>

<h3 id="v42_feat_product">Disabling Old Components, Versions and Milestones</h3>

<p>Older components, versions and milestones can now be disabled. [% terms.Bugs %]
  already using them are not affected, but these values will no longer be
  available for new [% terms.bugs %].</p>

<h3 id="v42_feat_custom">Displaying a Custom Field Value Based on Multiple Values
  of Another Field</h3>

<p>A custom field can now be displayed based on multiple values of another field.
  (For example, one custom field could now appear in multiple products.)
  Previously, you could only display a custom field based on a single value of
  another field.</p>

<h3 id="v42_feat_audit">Auditing of All Changes Within Bugzilla</h3>

<p>Most changes made through the admin interface are now logged to the database,
  in the <kbd>audit_log</kbd> table. There is no UI to access this table yet,
  but developers are free to create their own tools to track changes made into
  their installation. This is only a first step, and improvements are expected
  in future releases.</p>

<h3 id="v42_feat_wai">Accessibility Improvements</h3>

<p>A project has started thanks to Francisco Donalisio from IBM to make
  Bugzilla compliant with the W3C Web Accessibility Initiative
  standards. A lot more work still needs to be done, but we expect a much
  better compatibility for the next major release.</p>

<h3 id="v42_feat_other">Other Enhancements and Changes</h3>

<h4>Enhancements for Users</h4>

<ul>
  <li><strong>[% terms.Bugs %]:</strong> Users without editbugs privileges can
    no longer remove other users from the CC list of [% terms.bugs %].</li>
  <li><strong>[% terms.Bugs %]:</strong> Local [% terms.bug %] IDs are now valid
    in the See Also field. Adding such an ID will also add a reciprocal link in
    the other [% terms.bug %].</li>
  <li><strong>[% terms.Bugs %]:</strong> After editing [% terms.abug %] or an
    attachment, the URL is automatically changed to <kbd>show_bug.cgi</kbd>
    instead of <kbd>post_bug.cgi</kbd>, <kbd>process_bug.cgi</kbd> or
    <kbd>attachment.cgi</kbd> so that reloading the page (for instance when
    restarting the web browser) displays the right page. This feature is supported
    by Firefox, Chrome and Safari, but not by Internet Explorer 9.</li>
  <li><strong>[% terms.Bugs %]:</strong> Inactive accounts are no longer
    displayed in user fields when user-autocompletion is enabled.</li>
  <li><strong>[% terms.Bugs %]:</strong> User-autocompletion is now much faster
    on installations with many user accounts.</li>
  <li><strong>[% terms.Bugs %]:</strong> The See Also field now accepts URLs
    pointing to MantisBT, Trac, JIRA and the sourceforge.net b[%%]ug trackers.</li>
  <li><strong>[% terms.Bugs %]:</strong> Displaying [% terms.abug %] with many
    dependencies is now much faster.</li>
  <li><strong>Attachments:</strong> The encoding of text files can be automatically
    detected when uploading them as attachments.</li>
  <li><strong>Attachments:</strong> Clickjacking could possibly occur in an attachment 
    Details page if a user attached a specially formatted HTML file. To fix this 
    potential problem, the Details page always displays the HTML source instead and 
    users can see rendered page by clicking on View.</li>
  <li><strong>Flags:</strong> Changing the requestee of a flag no longer changes
    the requester.</li>
  <li><strong>Reports:</strong> If JavaScript is enabled in your web browser,
    tabular reports are now sortable based on any displayed column.</li>
  <li><strong>Dependency graphs:</strong> The <em>Show every [% terms.bug %] in
    the system with dependencies</em> option has been removed.</li>
  <li><strong>Searches:</strong> The columns displayed by default in
    [%+ terms.bug %]lists have changed. These columns are now displayed by default
    unless otherwise specified:<br>
    <kbd>product | component | assignee | [% terms.bug %] status | resolution |
    [%+ terms.bug %] summary | last change date</kbd><br>
    This means that the priority, severity and operating system columns are no
    longer displayed by default.</li>
  <li><strong>Searches:</strong> [% terms.Bug %]lists will now only display the
    first 500 [% terms.bugs %] by default. It is still possible to display the
    whole list, though.</li>
  <li><strong>Searches:</strong> When using relative dates and times, <kbd>-1w</kbd>
    is now a synonym for <kbd>-7d</kbd> and means exactly 7 days. Previously,
    <kbd>-1w</kbd> meant the beginning of the week, which was confusing some users.
    The same confusion existed for <kbd>-1d</kbd> which was different from
    <kbd>-24h</kbd>, and for <kbd>-1m</kbd> which was different from <kbd>-30d</kbd>.
    Now if you really want the beginning of the day, week or month, you must use
    <kbd>-1ds</kbd>, <kbd>-1ws</kbd>, and <kbd>-1ms</kbd> respectively, where
    "s" means "start of". This change will affect existing saved searches using
    relative dates.</li>
  <li><strong>Searches:</strong> A new <em>Include fulltext when performing quick
    searches</em> user preference has been added which permits users to include
    or exclude comments when using quicksearches.</li>
  <li><strong>Searches:</strong> It is now possible to query for [% terms.bugs %]
    based on personal tags in the Custom Search section in the Advanced Search
    page.</li>
  <li><strong>Email notifications: </strong> The date and time of comments are no
    longer displayed in the comment header in [% terms.bug%]mails. This information
    is already available in the email header itself.</li>
</ul>

<h4>Enhancements for Administrators and Developers</h4>

<ul>
  <li><strong>Installation:</strong> <kbd>checksetup.pl</kbd> is now much quieter
    when creating a new database.</li>
  <li><strong>Security:</strong> Bugzilla 4.0 is using
    <kbd>Math::Random::Secure</kbd> to generate cryptographically secure
    pseudorandom numbers, but it appeared that installing this Perl module from
    CPAN caused a lot of trouble for some people due to its numerous dependencies.
    So the RNG code has been rewritten to only depend on <kbd>Math::Random::ISAAC</kbd>,
    which was already in use in previous versions of Bugzilla.</li>
  <li><strong>Security:</strong> <kbd>X-Frame-Options = SAMEORIGIN</kbd> is now
    passed to all page headers (except when viewing attachments, as they can be
    on a different host) to protect users from framing and subsequent possible
    clickjacking problems.</li>
  <li><strong>Configuration:</strong> A new parameter <em>password_complexity</em>
    has been added (default: no_constraints) which allows admins to force users
    to use passwords with a higher complexity, such as a combination of uppercase
    and lowercase letters, numbers and special characters, or a subset of them.</li>
  <li><strong>Configuration:</strong> A new parameter <em>search_allow_no_criteria</em>
    has been added (default: on) which allows admins to forbid queries with no
    criteria. This is particularly useful for large installations with several
    tens of thousands [% terms.bugs %] where returning all [% terms.bugs %]
    doesn't make sense and would have a performance impact on the database.</li>
  <li><strong>Configuration:</strong> A new parameter <em>default_search_limit</em>
    has been added (default: 500) which limits the number of [% terms.bugs %]
    displayed by default in a [% terms.bug%]list. The user can ask to see a larger
    list, though.</li>
  <li><strong>Configuration:</strong> A new parameter <em>max_search_results</em>
    has been added (default: 10000) which limits the number of [% terms.bugs %]
    a user can request at once in a [% terms.bug%]list. This is a hard limit and
    a user cannot bypass this value.</li>
  <li><strong>Configuration:</strong> A new parameter <em>ajax_user_autocompletion</em>
    has been added (default: on) to allow administrators to disable auto-completion
    when typing characters in user fields. This parameter should only be disabled
    if your installation is unable to support the load generated by this feature.</li>
  <li><strong>Configuration:</strong> The <em>config_modify_panels</em> hook now
    lets you add additional parameters to existing parameters panels.</li>
  <li><strong>Flags:</strong> Users with local editcomponents privileges can now
    edit flag types for products they can administer.</li>
  <li><strong>Quips:</strong> A new system group <em>bz_quip_moderators</em> has
    been created to moderate quips. Till now, you had to be in the <em>admin</em>
    group to do that.</li>
  <li><kbd>importxml.pl</kbd> now inserts each comment separately into the imported
    [%+ terms.bug %] instead of concatenating them all into a single comment.</li>
  <li><kbd>email_in.pl</kbd> now ignores auto-submitted incoming emails (for
    instance, all these "out of office" emails).</li>
  <li>New code hooks: email_in_before_parse, email_in_after_parse,
    install_filesystem, install_update_db_fielddefs, job_map, object_end_of_create,
    quicksearch_map, user_preferences.</li>
</ul>

<h4>WebService Changes</h4>

<ul>
  <li>Two new methods have been added: <kbd>Product.create</kbd> and
    <kbd>Group.create</kbd>.</li>
  <li><kbd>B[%%]ug.update</kbd> no longer throws an error when passing an empty
    string to <kbd>see_also</kbd>. It now simply ignores this empty value.</li>
  <li><kbd>Product.get</kbd> now also returns data about the classification it
    belongs to as well as its components, milestones and versions. It also
    returns the <kbd>default_milestone</kbd> and <kbd>has_unconfirmed</kbd>
    attributes.</li>
  <li>In <kbd>B[%%]ug.fields</kbd>, the <kbd>sortkey</kbd> attribute used in
    <kbd>values</kbd> has been renamed to <kbd>sort_key</kbd>.</li>
  <li>In <kbd>B[%%]ug.attachments</kbd> and <kbd>B[%%]ug.add_attachment</kbd>,
    the <kbd>is_url</kbd> attribute no longer exists.</li>
</ul>


<h2 id="v42_issues">Outstanding Issues</h2>

<ul>
  <li><a href="https://bugzilla.mozilla.org/show_bug.cgi?id=89822">
    [%- terms.Bug %] 89822</a>: When changing multiple [% terms.bugs %] at
    the same time, there is no "mid-air collision" protection.</li>
  <li><a href="https://bugzilla.mozilla.org/show_bug.cgi?id=276230">
    [%- terms.Bug %] 276230</a>: The support for restricting access to
    particular Categories of New Charts is not complete. You should treat the
    <em>chartgroup</em> parameter as the only access mechanism available.</li>
  <li><a href="https://bugzilla.mozilla.org/show_bug.cgi?id=584742">
    [%- terms.Bug %] 584742</a>: When viewing [% terms.abug %], WebKit-based
    browsers can automatically reset a field's selected value when the field
    has disabled values.</li>
  <li><a href="https://bugzilla.mozilla.org/show_bug.cgi?id=780053">
    [%- terms.Bug %] 780053</a>: Oracle crashes when listing keywords, tags
    or flags in buglists.</li>
</ul>


<h2 id="v42_code_changes">Code Changes Which May Affect Customizations and Extensions</h2>

<ul>
  <li>The <kbd>email/newchangedmail.txt.tmpl</kbd> template is now fully templatized,
    meaning that the diff table displaying changes in [% terms.bug %] fields is
    now generated in the template itself. This means [% terms.bug %]mails are now
    fully localizable.</li>
  <li>The bugmail_recipients hook has been modified to pass <kbd>diffs</kbd> with
    changes made to the [% terms.bug %] as well as <kbd>users</kbd> including
    recipients of the email notification.</li>
  <li>YUI has been upgraded to 2.9.0.</li>
  <li>Due to the major code refactor of <kbd>B[%%]ugzilla/Search.pm</kbd>, any
    customization made against this file will probably need to be rewritten.</li>
  <li>The Bugzilla-specific <kbd>url_quote</kbd> filter used in templates
    has been removed and replaced by the <kbd>uri</kbd> filter from Template::Toolkit
    as they are now similar.</li>
  <li><kbd>long_list.cgi</kbd>, <kbd>showattachment.cgi</kbd> and <kbd>xml.cgi</kbd>
    have been removed from the codebase. As <a href="#v40_code_changes">announced</a>
    in the release notes of Bugzilla 4.0, these scripts were deprecated
    since Bugzilla 2.19.</li>
  <li><kbd>sidebar.cgi</kbd> has been removed, because Gecko-based browsers no
    longer support remote XUL, and its popularity is very low.</li>
  <li><kbd>contrib/yp_nomail.sh</kbd> has been removed. This script is no longer
    useful since Bugzilla 3.0.</li>
  <li><kbd>contrib/bugzilla_ldapsync.rb</kbd> has been removed. This script didn't
    work for a long time.</li>
</ul>


<h1 id="v42_previous">Bugzilla 4.0 Release Notes</h1>

<ul class="bz_toc">
  <li><a href="#v40_introduction">Introduction</a></li>
  <li><a href="#v40_point">Updates in this 4.0.x Release</a></li>
  <li><a href="#v40_req">Minimum Requirements</a></li>
  <li><a href="#v40_feat">New Features and Improvements</a></li>
  <li><a href="#v40_issues">Outstanding Issues</a></li>
  <li><a href="#v40_upgrading">Notes On Upgrading From a Previous Version</a></li>
  <li><a href="#v40_code_changes">Code Changes Which May Affect 
    Customizations and Extensions</a></li>
  <li><a href="#v40_previous">Release Notes for Previous Versions</a></li>
</ul>

<h2 id="v40_introduction">Introduction</h2>

<p>This is Bugzilla 4.0! Since 3.6 (our previous major
  release) we've come a long way, and we've come even further compared to
  3.0 in 2007! Since Bugzilla 3.0, almost every major user
  interface in Bugzilla has been redesigned, the WebServices have
  evolved enormously, there's a great new Extensions system, and there
  are hundreds of other new features. With the major redesigns that come
  particularly in this release compared to 3.6, we felt that it was time to
  call this release 4.0.</p>

<p>It's not just major WebService and UI enhancements that are new in
  Bugzilla 4.0&mdash;there are many other exciting new features,
  including automatic duplicate detection, enhanced custom field
  functionality, autocomplete for users, search improvements, and much
  more. Overall, 4.0 is far and away the best version of Bugzilla
  we've ever released.</p>

<p>If you're upgrading, make sure to read <a href="#v40_upgrading">Notes
  On Upgrading From a Previous Version</a>. If you are upgrading from a release
  before 3.6, make sure to read the release notes for all the 
  <a href="#v40_previous">previous versions</a> in between your version
  and this one, <strong>particularly the Upgrading section of each
  version's release notes</strong>.</p>

<p>We would like to thank
  <a href="http://www.itasoftware.com/">ITA Software</a>,
  the <a href="http://www.ibm.com/linux/ltc/">IBM Linux Technology Center</a>,
  and <a href="http://www.redhat.com/">Red Hat</a> for funding the development
  of certain features and improvements in this release of
  Bugzilla.</p>

<h2 id="v40_point">Updates in this 4.0.x Release</h2>

<h3>4.0.2</h3>

<p>This release fixes several security issues. See the
  <a href="http://www.bugzilla.org/security/3.4.11/">Security Advisory</a>
  for details.</p>

<p>In addition, the following important fixes/changes have been made in this
  release:</p>

<ul>
  <li>The <kbd>B[% %]ug.create</kbd> WebService method now throws an error if you
    pass a group name which doesn't exist. In Bugzilla 4.0 and 4.0.1,
    this group name was silently ignored, leaving your [% terms.bug %] unsecure
    if no other group applied.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=653341">[% terms.Bug %] 653341</a>)</li>
  <li>Moving several [% terms.bugs %] at once into another product displayed the
    same confirmation page again and again, and changes were never committed
    (regressed in 4.0).
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=663208">[% terms.Bug %] 663208</a>)</li>
  <li>Marking [% terms.abug %] as a duplicate now works in Internet Explorer 9.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=656769">[% terms.Bug %] 656769</a>)</li>
  <li><kbd>importxml.pl</kbd> no longer crashes when importing keywords (regressed
    in 4.0).
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=657707">[% terms.Bug %] 657707</a>)</li>
  <li>Data entered while reporting a new [% terms.bug %] could be lost if you had
    to click the "Back" button of your web browser.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=652427">[% terms.Bug %] 652427</a>)</li>
  <li>WebServices methods will return undefined [% terms.bug %] fields as undefined
    instead of as an empty string. This change is consistent with how
    Bugzilla 4.2 behaves.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=657561">[% terms.Bug %] 657561</a>)</li>
  <li>The XML-RPC interface now works with SOAP::Lite 0.711 and 0.712 under mod_perl.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=600810">[% terms.Bug %] 600810</a>)</li>
  <li>LWP 6.00 and newer require Perl 5.8.8 and above. When installing this module
    using <kbd>install-module.pl</kbd> on a Perl installation older than 5.8.8,
    LWP 5.837 will be installed instead.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=655912">[% terms.Bug %] 655912</a>)</li>
  <li>Viewing [% terms.abug %] report should be significantly faster when your
    installation has many custom fields.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=634812">[% terms.Bug %] 634812</a>)</li>
</ul>

<h3>4.0.1</h3>

<ul>
  <li>During installation, the CPAN module Math::Random::Secure would
    sometimes fail to install properly and give an error about
    <kbd>Math::Random::Secure::irand</kbd>. Now, when using
    <kbd>install-module.pl</kbd> to install Math::Random::Secure, this
    will no longer happen. If you are currently experiencing this b[% %]ug
    and it prevented you from installing 4.0, remove Math::Random::Secure
    from your <kbd>lib/</kbd> directory, like:
    <p><kbd>rm -rf lib/Math/Random/Secure*</kbd></p>
    <p>(<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=646578">[% terms.Bug %] 646578</a>)</p></li>
  <li>The "Remember values as bookmarkable template" button on the
    [%+ terms.bug %] entry page will now work even when some required fields
    are empty. 
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=640719">[% terms.Bug %] 640719</a>)</li>
  <li>Email notifications about dependencies and flags had the wrong
    timestamp.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=643910">[% terms.Bug %] 643910</a>
    and  (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=652165">[% terms.Bug %] 652165</a>)</li>
  <li>You can now select "UTC" as a valid timezone in General Preferences.
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=646209">[% terms.Bug %] 646209</a>)</li>
  <li>Automatic duplicate detection now works on PostgreSQL (although
    it is not as high-quality as on other DB platforms). 
    (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=634144">[% terms.Bug %] 634144</a>)</li>
   <li>Autcomplete for users now works even if you are using the
     "emailsuffix" option.
     (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=641519">[% terms.Bug %] 641519</a>)</li>
   <li>Javascript errors during series creation in New Charts have been
     fixed.
     (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=644285">[% terms.Bug %] 644285</a>)</li>
    <li>The "Show Votes" page now works, for installations using the Voting
      extension.
      (<a href="https://bugzilla.mozilla.org/show_bug.cgi?id=652381">[% terms.Bug %] 652381</a>)</li> 
</ul>

<h2 id="v40_req">Minimum Requirements</h2>

<p>Any requirements that are new since 3.6.3 will look like
  <span class="req_new">this</span>.</p>

<ul>
  <li><a href="#v40_req_perl">Perl</a></li>
  <li><a href="#v40_req_mysql">For MySQL Users</a></li>
  <li><a href="#v40_req_pg">For PostgreSQL Users</a></li>
  <li><a href="#v40_req_oracle">For Oracle Users</a></li>
  <li><a href="#v40_req_modules">Required Perl Modules</a></li>
  <li><a href="#v40_req_optional_mod">Optional Perl Modules</a></li>
  <li><a href="#v40_req_apache">Optional Apache Modules</a></li>
</ul>

<h3 id="v40_req_perl">Perl</h3>

<p>Perl v5.8.1</p>
<h3 id="v40_req_mysql">For MySQL Users</h3>

  <ul>
    <li>MySQL v4.1.2</li>
    <li><strong>perl module:</strong> DBD::mysql v4.00</li>
  </ul>

<h3 id="v40_req_pg">For PostgreSQL Users</h3>

  <ul>
    <li>PostgreSQL v8.00.0000</li>
    <li><strong>perl module:</strong> DBD::Pg v1.45</li>
  </ul>

<h3 id="v40_req_oracle">For Oracle Users</h3>

  <ul>
    <li>Oracle v10.02.0</li>
    <li><strong>perl module:</strong> DBD::Oracle v1.19</li>
  </ul>

<h3 id="v40_req_modules">Required Perl Modules</h3>

  <table class="req_table">
    <tbody>
      <tr>
        <th>Module</th><th>Version</th>
      </tr>
      <tr>
        <td>CGI</td>
        <td class="req_new">3.51</td>
      </tr>
      <tr>
        <td>Digest::SHA</td>
        <td>(Any)</td>
      </tr>
      <tr>
        <td>Date::Format</td>
        <td>2.21</td>
      </tr>
      <tr>
        <td>DateTime</td>
        <td>0.28</td>
      </tr>
      <tr>
        <td>DateTime::TimeZone</td>
        <td>0.71</td>
      </tr>
      <tr>
        <td>DBI</td>
        <td>1.41</td>
      </tr>
      <tr>
        <td>Template</td>
        <td>2.22</td>
      </tr>
      <tr>
        <td>Email::Send</td>
        <td>2.00</td>
      </tr>

      <tr>
        <td>Email::MIME</td>
        <td class="req_new">1.904</td>
      </tr>
      <tr>
        <td>URI</td>
        <td>(Any)</td>
      </tr>
      <tr>
        <td class="req_new">List::MoreUtils</td>
        <td class="req_new">0.22</td>
      </tr>
    </tbody>
  </table>

<h3 id="v40_req_optional_mod">Optional Perl Modules</h3>

<p>The following perl modules, if installed, enable various
  features of Bugzilla:</p>

  <table class="req_table">
    <tbody>
      <tr>
        <th>Module</th><th>Version</th><th>Enables Feature</th>
      </tr>
      <tr>
        <td>GD</td>
        <td>1.20</td>
        <td>Graphical Reports, New Charts, Old Charts</td>
      </tr>
      <tr>
        <td>Chart::Lines</td>
        <td>2.1</td>
        <td>New Charts, Old Charts</td>
      </tr>
      <tr>
        <td>Template::Plugin::GD::Image</td>
        <td>(Any)</td>
        <td>Graphical Reports</td>
      </tr>
      <tr>
        <td>GD::Text</td>
        <td>(Any)</td>
        <td>Graphical Reports</td>
      </tr>
      <tr>
        <td>GD::Graph</td>
        <td>(Any)</td>
        <td>Graphical Reports</td>
      </tr>
      <tr>
        <td>MIME::Parser</td>
        <td>5.406</td>
        <td>Move [% terms.Bugs %] Between Installations</td>
      </tr>
      <tr>
        <td>LWP::UserAgent</td>
        <td>(Any)</td>
        <td>Automatic Update Notifications</td>
      </tr>
      <tr>
        <td>XML::Twig</td>
        <td>(Any)</td>
        <td>Move [% terms.Bugs %] Between Installations, Automatic Update
          Notifications</td>
      </tr>
      <tr>
        <td>PatchReader</td>
        <td>0.9.4</td>
        <td>Patch Viewer</td>
      </tr>
      <tr>
        <td>Net::LDAP</td>
        <td>(Any)</td>
        <td>LDAP Authentication</td>
      </tr>
      <tr>
        <td>Authen::SASL</td>
        <td>(Any)</td>
        <td>SMTP Authentication</td>
      </tr>
      <tr>
        <td>Authen::Radius</td>
        <td>(Any)</td>
        <td>RADIUS Authentication</td>
      </tr>
      <tr>
        <td>SOAP::Lite</td>
        <td class="req_new">0.712</td>
        <td>XML-RPC Interface</td>
      </tr>
      <tr>
        <td>JSON::RPC</td>
        <td>(Any)</td>
        <td>JSON-RPC Interface</td>
      </tr>
      <tr>
        <td class="req_new">JSON::XS</td>
        <td class="req_new">2.0</td>
        <td>Make JSON-RPC Faster</td>
      </tr>
      <tr>
        <td>Test::Taint</td>
        <td>(Any)</td>
        <td>JSON-RPC Interface, XML-RPC Interface</td>
      </tr>
      <tr>
        <td>HTML::Parser</td>
        <td>3.40</td>
        <td>More HTML in Product/Group Descriptions</td>
      </tr>
      <tr>
        <td>HTML::Scrubber</td>
        <td>(Any)</td>
        <td>More HTML in Product/Group Descriptions</td>
      </tr>
      <tr>
        <td>Email::MIME::Attachment::Stripper</td>
        <td>(Any)</td>
        <td>Inbound Email</td>
      </tr>
      <tr>
        <td>Email::Reply</td>
        <td>(Any)</td>
        <td>Inbound Email</td>
      </tr>
      <tr>
        <td>TheSchwartz</td>
        <td>(Any)</td>
        <td>Mail Queueing</td>
      </tr>
      <tr>
        <td>Daemon::Generic</td>
        <td>(Any)</td>
        <td>Mail Queueing</td>
      </tr>
      <tr>
        <td>mod_perl2</td>
        <td>1.999022</td>
        <td>mod_perl</td>
      </tr>
      <tr>
        <td>Apache2::SizeLimit</td>
        <td class="req_new">0.93</td>
        <td>mod_perl</td>
      </tr>
      <tr>
        <td class="req_new">Math::Random::Secure</td>
        <td class="req_new">0.05</td>
        <td>Improve cookie and token security</td>
      </tr>
    </tbody>
  </table>

<h3 id="v40_req_apache">Optional Apache Modules</h3>

<p>If you are using Apache as your webserver, Bugzilla can
  now take advantage of some Apache features if you have the below Apache
  modules installed and enabled. Currently,
  <a href="#v40_feat_js_css_update">certain Bugzilla features</a>
  are enabled only if you have all of the following modules installed
  and enabled:</p>

<ul>
  <li>mod_headers</li>
  <li>mod_expires</li>
  <li>mod_env</li>
</ul>

<p>On most systems (but not on Windows), <kbd>checksetup.pl</kbd> is able to
  tell whether or not you have these modules installed, and it will tell
  you.</p>

<h2 id="v40_feat">New Features and Improvements</h2>

<ul>
  <li><a href="#v40_feat_dup">Automatic Duplicate Detection When Filing
    [%+ terms.Bugs %]</a></li>
  <li><a href="#v40_feat_search_ui">New Advanced Search UI</a></li>
  <li><a href="#v40_feat_attach_ui">New Attachment Details UI</a></li>
  <li><a href="#v40_feat_autocomplete">Autocomplete for Users and
    Keywords</a></li>
  <li><a href="#v40_feat_ui">General Usability Improvements</a></li>
  <li><a href="#v40_feat_workflow">New Default Status Workflow</a></li>
  <li><a href="#v40_feat_lists">"Last Search" Now Remembers Multiple
    Searches</a></li>
  <li><a href="#v40_feat_jsonp">Cross-Domain WebServices with JSONP</a></li>
  <li><a href="#v40_feat_ws">Major WebService Enhancements</a></li>
  <li><a href="#v40_feat_mandatory">Mandatory Custom Fields</a></li>
  <li><a href="#v40_feat_vot_ext">Voting Is Now An Extension</a></li>
  <li><a href="#v40_feat_js_css_update">Users Get New CSS and Javascript
    Automatically</a></li>
  <li><a href="#v40_feat_hooks">Many New Hooks</a></li>
  <li><a href="#v40_feat_apache_config">New Apache Configuration</a></li>
  <li><a href="#v40_feat_other">Other Enhancements and Changes</a></li>
</ul>

<h3 id="v40_feat_dup">Automatic Duplicate Detection When Filing
  [%+ terms.Bugs %]</h3>

<p>When filing [% terms.abug %], as soon as you start typing in the summary
  field, Bugzilla will suggest possible duplicates of the
  [%+ terms.bug %] you are filing.</p>

<p>In order for this feature to work, all pre-requisites for JSON-RPC
  support must be installed on your Bugzilla. It will be
  much faster on installations that run under mod_perl than it will
  be on other installations.</p>

<h3 id="v40_feat_search_ui">New Advanced Search UI</h3>

<p>Thanks to the UI work of <a href="http://guy-pyrzak.blogspot.com/">Guy
  Pyrzak</a>, the Advanced Search UI has been completely redesigned.
  It is now much simpler, and far more approachable for new users, while
  still retaining all of the features that power users are used to.</p>

<h3 id="v40_feat_attach_ui">New Attachment Details UI</h3>

<p>The UI used for editing attachment details has been completely
  redesigned, allowing for a normally-size comment box to be used
  when commenting on attachments, and allowing nearly the entire screen
  width to be used when doing code reviews or editing an attachment as
  a comment.</p>

<p>Thanks to <a href="http://guy-pyrzak.blogspot.com/">Guy Pyrzak</a> for
  his excellent work on this UI redesign.</p>

<h3 id="v40_feat_autocomplete">Autocomplete for Users and Keywords</h3>

<p>Once you type at least three characters in any field that can contain a user
  (including the [% field_descs.cc FILTER html %],
  [%+ field_descs.qa_contact FILTER html %], or
  [%+ field_descs.assigned_to FILTER html %] fields), a list will appear
  containing all of the users whose real names or usernames match what you are
  typing. Your Bugzilla must have all of the optional Perl
  modules required for JSON-RPC support installed, though, in order for
  this feature to work. Also, this feature will be <strong>much</strong>
  faster on installations that run under mod_perl than it will be on
  other installations.</p>

<p>There is also a similar autocomplete for the Keywords field. The
  Keywords autocomplete does not require JSON-RPC.</p>

<h3 id="v40_feat_ui">General Usability Improvements</h3>

<p>In addition to the enhancements listed above, there have been
  <strong>many</strong> improvements made across the Bugzilla
  user interface. For a list of specific enhancements that were significant,
  see the <a href="#v40_feat_other">Other Enhancements and Changes</a>
  section.</p>

<h3 id="v40_feat_workflow">New Default Status Workflow</h3>

<p>For new installations of Bugzilla, the default set of
  statuses will now be:</p>

<ul>
  <li>UNCONFIRMED</li>
  <li>CONFIRMED</li>
  <li>IN_PROGRESS</li>
  <li>RESOLVED</li>
  <li>VERIFIED</li>
</ul>

<p>And the UNCONFIRMED status will be enabled by default in all products.</p>

<p>On upgrade, existing installations will not be affected--you will retain
  your existing status workflow. However, we strongly recommend that you
  update your existing workflow to the new one, using a special tool
  we've included, <kbd>contrib/convert-workflow.pl</kbd>, which you
  can run after you use <kbd>checksetup.pl</kbd> to upgrade. The
  <kbd>whineatnews.pl</kbd> and <kbd>bugzilla-submit</kbd> scripts
  will probably not work properly if you continue to use the old workflow
  (though most other parts of Bugzilla will still function
  normally).</p>

<p>For more information about the workflow and our rationale for changing
  it, see the
  <a href="http://bugzillaupdate.wordpress.com/2010/07/06/bugzilla-4-0-has-a-new-default-status-workflow/">blog
  post about it</a> and the
  <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=486292">[% terms.bug %]
  where the change was made</a>.</p>

<h3 id="v40_feat_lists">"Last Search" Now Remembers Multiple Searches</h3>

<p>At the top of every [% terms.bug %] in Bugzilla, there are
  links that look like: "First", "Last", "Prev", "Next", and
  "Show last search results". In earlier versions of Bugzilla,
  if you did two separate searches in separate windows, these links would
  only work for the <em>last</em> search you did. Now, Bugzilla
  will "remember" which search result you came from and give you the right
  "last search results" or "next [% terms.bug %]" from <em>that</em> list,
  instead of always using your most recent search.</p>

<p>There are still some situations where Bugzilla will have to
  "guess" which search you are trying to navigate through, but it does its
  best to get it right.</p>

<h3 id="v40_feat_jsonp">Cross-Domain WebServices with JSONP</h3>

<p>Bugzilla now supports making WebService calls from
  another domain, inside of a web browser, thanks to support for
  <a href="http://bob.pythonmac.org/archives/2005/12/05/remote-json-jsonp/">JSONP</a>.
  This will allow for web "mash-ups" to use Bugzilla data.
  When using JSONP, you may only call functions that <em>get</em> data, 
  you may not call functions that <em>change</em> data.</p>

<p>For more details, see the
  <a href="[% docs_urlbase FILTER html %]api/Bugzilla/WebService/Server/JSONRPC.html#JSONP">JSONP
  section</a> of the JSON-RPC WebService documentation.</p>

<h3 id="v40_feat_ws">Major WebService Enhancements</h3>

<p>The WebService has been expanded considerably. The WebService should now be
  able to do everything with [% terms.bugs %] that you can do via the
  web interface, including updating [% terms.bugs %], adding attachments,
  and getting attachment data. For specifics, see the
  <a href="#v40_feat_ws_changes">WebService Changes</a> section of these
  release notes.</p>

<h3 id="v40_feat_mandatory">Mandatory Custom Fields</h3>

<p>You can now specify that certain custom fields are "mandatory",
  meaning that they must have a value when [% terms.abug %] is filed,
  and they can never be empty after that.</p>

<h3 id="v40_feat_vot_ext">Voting Is Now An Extension</h3>

<p>All of the code for voting in Bugzilla has been moved
  into an extension, called "Voting", in the <kbd>extensions/Voting/</kbd>
  directory. To enable it, you must remove the <kbd>disabled</kbd> file
  from that directory, and run <kbd>checksetup.pl</kbd>.</p>

<p>In a future version of Bugzilla, the Voting extension will
  be moved outside of the Bugzilla core code, so we are looking
  for somebody who has an interest in the Voting system and would like to
  maintain it as a separate extension. There are many enhancement requests
  that have been made against the Voting system, and the best way for those
  to get addressed is for somebody to step up and offer to maintain the
  system outside of Bugzilla's core code.</p>

<h3 id="v40_feat_js_css_update">Users Get New CSS and Javascript
  Automatically</h3>
  
<p>In past versions of Bugzilla, if you changed
  Bugzilla's CSS or Javascript files, then every user of
  Bugzilla would have to clear their cache in order to get
  the updated files. Now, if you are using Apache as your webserver and
  you have the <a href="#v40_req_apache">optional Apache modules</a>
  installed and enabled, users will automatically get every new version of
  Bugzilla's Javascript and CSS without having to clear
  their caches.</p>

<p>This feature also gives a slight performance speedup to
  Bugzilla in some cases, and so we recommend that all
  administrators install and enable the optional Apache modules if possible.</p>

<h3 id="v40_feat_hooks">Many New Hooks</h3>

<p>Many new code hooks have been added for use by Extensions,
  in Bugzilla 4.0. Now Extensions can access and modify
  nearly every part of Bugzilla.</p>

<h3 id="v40_feat_apache_config">New Apache Configuration</h3>

<p>If you run Bugzilla under Apache (as most people do),
  you most likely require a <strong>new Apache configuration</strong> 
  for this version of Bugzilla. See the
  <a href="#v40_upgrading">Notes On Upgrading From a Previous Version</a>
  section for details.</p>

<h3 id="v40_feat_other">Other Enhancements and Changes</h3>

<h4>Enhancements for Users</h4>

<ul>
  <li>Now, everywhere in Bugzilla where you can enter a date,
    there is a Calendar widget where you can select the date on a
    calendar.</li>
  <li>The big icons on the front page have been replaced with much nicer
    icons, thanks to Jon Pink of <a href="http://www.jpink.co.uk/">J.&nbsp;Pink&nbsp;Design</a>!</li>
  <li><strong>[% terms.Bugs %]:</strong> When filing [% terms.bugs %],
    you will now be warned if you forgot to fill in any mandatory fields,
    <em>before</em> the page is submitted.</li>
  <li><strong>[% terms.Bugs %]:</strong> When filing [% terms.abug %],
    you can hover your mouse over any of the field labels on the page
    to get a brief description of what that field is and what its purpose
    is.</li>
  <li><strong>[% terms.Bugs %]:</strong> When adding Hours Worked to [% terms.abug %],
    you are no longer required to comment.</li>
  <li><strong>[% terms.Bugs %]:</strong> There is now a user preference
    for whether the comment box appears above or below the existing
    comments.</li>
  <li><strong>[% terms.Bugs %]:</strong> Bugzilla will now
    send an email for every comment that you mark or un-mark as being
    private. (Previous versions of Bugzilla did not send emails
    to users about this change.) The state of comments being made private
    is also now stored in [% terms.abug %]'s history.</li>
  <li><strong>[% terms.Bugs %]:</strong> The box to "Add [% terms.Bug %] URLs"
    in the See Also field is now hidden behind an "(add)" link that you
    have to click to see the box.</li>
  
  <li><strong>Searches:</strong> You can now properly search for field values
    that have commas in their name, when using the Advanced Search form.</li>
  <li><strong>Searches:</strong> The "URL" field can now be shown as a column
    in search results.</li>
  <li><strong>Searches:</strong> When viewing a search result, you can now
    click on the Summary of the [% terms.bug %] in order to go to the
    [%+ terms.bug %]-view page, in addition to being able to click on the
    [%+ terms.bug %] ID.</li>
  <li><strong>Searches:</strong> When doing a search using the "quicksearch"
    box in the header or footer, the box will still contain what you searched
    for when viewing the search results page.</li>
  <li><strong>Searches:</strong> Multi-select custom fields can now be
    shown as columns in the search results.</li>
  <li><strong>Searches:</strong> When using the Boolean Charts (now called
    "Custom Search"), if you specify both a criterion for an attachment
    and a criteron for a flag, then only [% terms.bugs %] that have
    attachments with that flag will be found.</li>
  <li><strong>Searches:</strong> If you hover your mouse over the field labels
    on the Advanced Search page, you will get a description of what that
    field is.</li>
  <li><strong>Searches:</strong> When searching via a saved search, if you
    accidentally click on "Forget Search", there is a link to undo it.</li>
  <li><strong>Searches:</strong> When using the Boolean Charts (now called
    "Custom Search"), you can search for values "greater than or equal to"
    or "less than or equal to" some value.</li>
  
  <li><strong>Flags:</strong> If you hover your mouse over the name of
    a flag setter when viewing [% terms.abug %], you can see that
    flag setter's full name and complete username.</li>
  <li><strong>Flags:</strong> When setting a flag on [% terms.abug %],
    the box for entering a requestee does not appear until you set the flag
    to "?", now.</li>
  <li><strong>Flags:</strong> On the "My Requests" page, [% terms.bugs %]
    that are restricted to certain groups now properly have the "padlock"
    icon shown next to them to indicate that they may contain confidential
    information.</li>
  
  <li>When using the Reports interface, you can now choose many more fields
    as the X, Y, or Z axis of a report, including custom fields.</li>
  <li>Bugzilla now prevents
    Internet Explorer 8 and later from attempting to render
    <kbd>text/plain</kbd> attachments as HTML.</li>
  <li>If you receive a Whine mail that is empty, there will now be a brief
    message explaining that your search found no results.</li>
  <li>The <a href="page.cgi?id=fields.html">Field Help Page</a> now
    contains a description of every single field that can be on
    [%+ terms.abug %] in Bugzilla.</li>
</ul>

<h4>Enhancements for Administrators and Developers</h4>

<ul>
  <li>The system for moving [% terms.bugs %] between installations has been
    moved into an extension called <kbd>OldBugMove</kbd>. This system was used
    by very few Bugzilla installations--if you aren't certain
    whether or not you are using it, you're not using it. To enable the system,
    you have to remove the file <kbd>extensions/OldBugMove/disabled</kbd>
    and then run <kbd>checksetup.pl</kbd>. In a future version of Bugzilla,
    this extension may be moved outside of the core Bugzilla code,
    so if you are interested in maintaining it, please let us know.</li>
  <li><strong>Custom Fields: </strong> "[% terms.Bug %] ID" custom fields can
    now represent relationships between [% terms.bugs %], similarly to how the
    [%+ field_descs.blocked FILTER html %] and
    [%+ field_descs.dependson FILTER html %] fields work now.</li>
  <li><strong>Custom Fields:</strong> You can now restrict the visibility
    of custom fields and their values to a specific Component or
    Classification.</li>
  <li>The "keyword cache" has been removed. When you edit keywords, you no
    longer will have to "rebuild the keyword cache" after you are done.</li>
  <li>Running <kbd>./collectstats.pl --regenerate</kbd> will now take
    minutes or hours, instead of days.</li>
  <li>When using <kbd>email_in.pl</kbd>, there are two new switches,
    <kbd>--default</kbd> and <kbd>--override</kbd>, which allow you to
    specify certain default values or override specified values for
    <kbd>@field</kbd> values sent in emails. (This also allows you to specify
    defaults for everything so that people do not have to specify any field
    values when filing [% terms.abug %] via email.)</li>
  <li><strong>Installation:</strong> If you are using a localized version of
    Bugzilla and your terminal does not understand Unicode,
    <kbd>checksetup.pl</kbd> will now attempt to output its messages in your
    terminal's character set.</li>
  <li><strong>Installation:</strong> Bugzilla no longer needs empty
    "placeholder" CSS in the <kbd>skins/custom</kbd> directory and other
    directories. When you update, <kbd>checksetup.pl</kbd> will remove these.
    This also significantly reduces the number of HTTP requests required to
    load a page for the first time in Bugzilla.</li>
  <li><strong>Installation:</strong> For Windows users, Bugzilla
    now supports Strawberry Perl fully.</li>
  <li><strong>Installation:</strong> Now, whenever <kbd>checksetup.pl</kbd>
    throws an error, it will be printed in the color red, to make it
    obvious that something is wrong.</li>
  <li><strong>Installation:</strong> Some actions of <kbd>checksetup.pl</kbd> were
    silent, in the past. Now, <kbd>checksetup.pl</kbd> will print a message for
    almost anything it does.</li>
  <li><strong>Installation:</strong> The process of adding foreign keys
    to a table is now much faster. This will particularly improve the speed
    of upgrading from Bugzilla 3.4 or earlier.</li>
  <li>If you are using <kbd>jobqueue.pl</kbd> and email gets heavily delayed
    for some reason, those emails will now have a Date header reflecting the
    time they were <em>supposed</em> to be sent, instead of when they actually
    <em>were</em> sent.</li>
  <li><kbd>./jobqueue.pl install</kbd> now works on SuSE Linux.</li>
  <li>Bugzilla now runs much better in Apache's suexec mode
    than it used to. As part of this, <kbd>checksetup.pl</kbd> sets
    much stricter permissions on all the files in Bugzilla
    than it used to. In particular, any files that Bugzilla
    does not know about will not be readable by the webserver.</li>
  <li>The <kbd>sendmailnow</kbd> parameter has been removed, as it was
    not necessary for any modern version of Sendmail or other Mail Transfer
    Agent.</li>
  <li>When editing a user via the Users administration panel, you can now
    see if they are a Default CC on any component.</li>
  <li>For new installations of Bugzilla, all users will be
    able to see and use the Whining system by default.</li>
  <li>When you are using SSL with Bugzilla, you can now
    turn on the <kbd>strict_transport_security</kbd> parameter to
    send the
    <a href="https://developer.mozilla.org/en/Security/HTTP_Strict_Transport_Security">Strict-Transport-Security</a>
    header with every HTTPS connection, for additional security.</li>
  <li>New code hooks (see their documentation in
    <a href="[% docs_urlbase FILTER html %]api/Bugzilla/Hook.html">Bugzilla::Hook</a>):
    bug_check_can_change_field, search_operator_field_override,
    bugmail_relationships, object_columns, object_update_columns,
    and object_validators. The colchange_columns hook has been removed,
    as it is no longer necessary (buglist_columns will be used for data
    about which columns can be on the [% terms.bug %] list).</li>
  <li>When Bugzilla throws certain types of errors, it will
    now include a "traceback" of where exactly the error occurred in the
    code, to help administrators and developers debug problems.</li>
  <li>There is now a test, <kbd>xt/search.t</kbd>, that assures that all
    of the functionality of <kbd>Bugzilla::Search</kbd> is working properly.
    If you customize the search functionality of Bugzilla,
    you may wish to run this test to assure that your changes are correct.
    You can see more information about running this test by doing
    <kbd>perldoc xt/search.t</kbd> at the command line.</li>
  <li>Bugzilla now sends the
    <a href="https://developer.mozilla.org/en/the_x-frame-options_response_header"><code>X-Frame-Options: SAMEORIGIN</code></a> header
    with every page request in order to prevent "clickjacking" attacks. Note
    that this prevents other domains from displaying Bugzilla
    in an HTML frame.</li> 
</ul>

<h4 id="v40_feat_ws_changes">WebService Changes</h4>

<ul>
  <li>You can now call some JSON-RPC methods using HTTP GET, in addition to
    using HTTP POST. See the 
    <a href="[% docs_urlbase FILTER html %]api/Bugzilla/WebService/Server/JSONRPC.html#Connecting_via_GET">JSON-RPC
    documentation</a> for details.</li>
  <li>You can now update existing [% terms.bugs %] using the
    <a href="[% docs_urlbase FILTER html %]api/Bugzilla/WebService/Bug.html#update">B[% %]ug.update</a>
    function.</li>
  <li>You can now add attachments to [% terms.bugs %] using the
    <a href="[% docs_urlbase FILTER html %]api/Bugzilla/WebService/Bug.html#add_attachment">B[% %]ug.add_attachment</a>
    function.</li>
  <li>The <kbd>B[% %]ug.get</kbd> function now returns all of [% terms.abug %]'s
    information other than comments and attachments.</li>
  <li><kbd>B[% %]ug.get</kbd> no longer returns the <kbd>internals</kbd> hash.</li>
  <li>The <kbd>B[% %]ug.attachments</kbd> function now also returns attachment
    data.</li>
  <li>The following functions now support the <kbd>include_fields</kbd>
    and <kbd>exclude_fields</kbd> arguments: <kbd>B[% %]ug.get</kbd>,
    <kbd>B[% %]ug.search</kbd>, and <kbd>B[% %]ug.attachments</kbd>. Also,
    server-side performance of the WebService is actually increased when
    using these arguments, now, as Bugzilla will no longer
    get data from the database for fields you haven't asked for.</li>
  <li>You can now mark the initial description of [% terms.abug %] as
    private when filing [% terms.abug %] via the <kbd>B[% %]ug.create</kbd>
    function.</li>
  <li>You can now specify groups to put [% terms.abug %] in, in the
    <a href="[% docs_urlbase FILTER html %]api/Bugzilla/WebService/Bug.html#create">B[% %]ug.create</a>
    function. (This also means that you can specify groups when filing
    [%+ terms.abug %] via email_in.pl.)</li>
  <li>The <kbd>User.get</kbd> function now accepts <kbd>groups</kbd>
    and <kbd>group_ids</kbd> arguments, to limit the returned values to
    only users in the specified groups.</li>
  <li>There is a new, undocumented B[% %]ug.possible_duplicates
    function that helps implement the automatic duplicate detection
    system. Because this function is not documented, its API may change
    between releases of Bugzilla.</li>
  <li>You can no longer search using the <kbd>votes</kbd> argument in
    <kbd>B[% %]ug.search</kbd>.</li>
  <li><kbd>B[% %]ug.attachments</kbd> now returns the attachment's description
    using the name "summary" instead of the name "description", to be
    consistent with the fact that [% terms.bug %] summaries are called
    "summary". The value is still <em>also</em> returned as "description",
    for backwards compatibility, but this backwards compatibility will go
    away in Bugzilla 5.0.</li>
  <li>In the return values of various <kbd>B[% %]ug</kbd> functions, the author
    of comments, [% terms.bugs %], and attachments is now called "creator",
    instead of sometimes being called "reporter", "author", or "attacher".
    The old names are retained for backwards-compatibility, and will stay
    around until Bugzilla 5.0.</li>
</ul>

<h2 id="v40_issues">Outstanding Issues</h2>

<ul>
  <li><a href="https://bugzilla.mozilla.org/show_bug.cgi?id=423439">
    [%- terms.Bug %] 423439</a>: Tabs in comments will be converted
    to four spaces, due to a b<!-- -->ug in Perl as of Perl 5.8.8.</li>
  <li><a href="https://bugzilla.mozilla.org/show_bug.cgi?id=89822">
    [%- terms.Bug %] 89822</a>: When changing multiple [% terms.bugs %] at 
    the same time, there is no "mid-air collision" protection.</li>
  <li><a href="https://bugzilla.mozilla.org/show_bug.cgi?id=276230">
    [%- terms.Bug %] 276230</a>: The support for restricting access to 
    particular Categories of New Charts is not complete. You should treat 
    the 'chartgroup' Param as the only access mechanism available.<br>
    However, charts migrated from Old Charts will be restricted to 
    the groups that are marked MANDATORY for the corresponding Product.
    There is currently no way to change this restriction, and the 
    groupings will not be updated if the group configuration
    for the Product changes.</li>
</ul>

<h2 id="v40_upgrading">Notes On Upgrading From a Previous Version</h2>

<h3>IMPORTANT: Apache Configuration Change</h3>

<h4>mod_cgi</h4>

<p>If you run Bugzilla under mod_cgi (this is the most common
  configuration, involving a &lt;Directory&gt; block in your Apache config
  file), you will need to update the configuration of Apache for 
  Bugzilla. In particular, this line in the Bugzilla
  <kbd>&lt;Directory&gt;</kbd> block:</p>

<blockquote><code>AllowOverride Limit</code></blockquote>

<p>needs to become:</p>

<blockquote><code>AllowOverride Limit FileInfo Indexes</code></blockquote>
 
<p>For full details on how to configure Apache for Bugzilla,
  see the
  <a href="[% docs_urlbase FILTER html %]configuration.html#http-apache">Configuration</a>
  section of the Bugzilla Guide.</p>

<h4>mod_perl</h4>

<p>If your Bugzilla runs under mod_perl, the required Apache
  configuration is now simpler. The line that used to look like:</p>

<blockquote><code>PerlSwitches -w -T -I/var/www/html/bugzilla 
    -I/var/www/html/bugzilla/lib</code></blockquote>

<p>Now should be only:</p>

<blockquote><code>PerlSwitches -w -T</code></blockquote>

<p>The <code>PerlConfigRequire</code> line should stay the same, however.</p>

<h3>New .htaccess file</h3>

<p>In previous versions of Bugzilla, there was a file
  in Bugzilla's root directory called ".htaccess" that was
  generated by <kbd>checksetup.pl</kbd>. This file is now shipped with
  Bugzilla instead of being generated during installation.</p>

<p>If you update via CVS or bzr, you will get a message that your existing
  .htaccess file conflicts with the new one. You must
  <strong>remove your existing .htaccess file</strong> and use the new one
  instead. Continuing to use your old .htaccess file will cause certain new
  features of Bugzilla to not work properly, and may also lead
  to security issues for your system in the future.</p>

<h2 id="v40_code_changes">Code Changes Which May Affect Customizations and
  Extensions</h2>

<ul>
  <li>In Extensions, if you want to serve files to the user via the web,
    they must now be in a <kbd>web/</kbd> subdirectory of your Extension.
    (For example, <kbd>extensions/Foo/web/</kbd>). <kbd>checksetup.pl</kbd>
    sets permissions on extensions much more strictly now, and files in
    other locations (such as your base <kbd>extensions/Foo/</kbd> directory)
    will no longer be available to Bugzilla users via the web
    under certain configurations.</li>
  <li>Previous versions of Bugzilla used to allow putting a
    single file into the "skins" directory and having that be an entire
    skin. That is no longer allowed, and on upgrade, <kbd>checksetup.pl</kbd>
    will convert any such skins into a directory with a single
    <kbd>global.css</kbd> file in them.</li>
  <li>When updating [% terms.bugs %], you should now use
    <code>$bug-&gt;set_all</code> instead of using the individual
    <kbd>set_</kbd> methods. In particular, <kbd>set_all</kbd> is now the
    <em>only</em> way to set the product of [% terms.abug %]. See
    <kbd>process_bug.cgi</kbd> for an example of how <kbd>set_all</kbd>
    should be used.</li>
  <li>You should not insert &lt;script&gt; tags and &lt;link&gt; CSS tags
    into HTML anymore, in Extensions or in your customizations. Instead,
    you should push new values into the <kbd>style_urls</kbd> or
    <kbd>javascript_urls</kbd> parameters. If you have to insert manual
    tags for some reason, be sure to call "FILTER mtime" on the URL. (Search
    for other uses of "FILTER mtime" in the templates to see how it is
    used.)</li>
  <li>When calling <kbd>Bugzilla::BugMail::Send</kbd>, the "changer"
    argument must now be a <kbd>Bugzilla::User</kbd> object, not just
    a login name. The "owner" and "qacontact" arguments are still
    just login names.</li>
  <li>When creating a new subclass of Bugzilla::Object, you should no
    longer use <kbd>UPDATE_VALIDATORS</kbd>. Also, in most cases you will
    no longer need to override <kbd>run_create_validators</kbd>. Instead,
    there is a new constant called
    <a href="[% docs_urlbase FILTER html %]api/Bugzilla/Object.html#VALIDATOR_DEPENDENCIES">VALIDATOR_DEPENDENCIES</a>,
    that specifies that certain fields have to be validated before other fields.
    Then, all validators receive each already-validated value in a hash
    as their fourth argument, so each validator can know the other values
    that were passed in, while an object is being created. For an example of
    how to use <kbd>VALIDATOR_DEPENDENCIES</kbd>, see
    <kbd>Bugzilla/Field.pm</kbd>.</li>
  <li>In previous versions of Bugzilla, you had to call
    <code>Bugzilla-&gt;template_inner("")</code> after any time
    that you called <kbd>template_inner</kbd> for a specific language.
    It is no longer necessary to do this second <kbd>template_inner</kbd>
    call.</li>
  <li><kbd>post_bug.cgi</kbd> and <kbd>Bugzilla::Bug-&gt;create</kbd> now take
    the <em>names</em> of groups instead of group ids.</li>
  <li>Bugzilla::Bugmail now uses Bugzilla::Bug objects internally instead of
    a lot of direct SQL.</li>
  <li>For sending changes about [% terms.bugs %], there is now a method
    called <kbd>send_changes</kbd> that you can call on Bugzilla::Bug
    objects. For an example of its use, see <kbd>process_bug.cgi</kbd>.</li>
  <li>The <kbd>Bugzilla::Search</kbd> class has been refactored, and should
    now be easier to customize.</li>
  <li>The <kbd>Bugzilla::Util::lsearch</kbd> function is gone. Use
    <kbd>firstidx</kbd> from <kbd>List::MoreUtils</kbd>, instead.</li>
  <li>Bugzilla now includes YUI 2.8.2.</li>
  <li><kbd>long_list.cgi</kbd>, <kbd>showattachment.cgi</kbd> and
    <kbd>xml.cgi</kbd> are deprecated scripts which are no longer actively
    used since Bugzilla 2.19. These scripts will be removed in
    Bugzilla 4.2.</li>
</ul>

<h2 id="v40_previous">Release Notes For Previous Versions</h2>

<p><a href="page.cgi?id=release-notes3.html">Release Notes for
  Bugzilla 3.x and Earlier</a></p>

[% INCLUDE global/footer.html.tmpl %]

[% BLOCK db_req %]
  [% SET m = DB_MODULE.$db %]
  <h3 id="v40_req_[% db FILTER html %]">For [% m.name FILTER html %] Users</h3>

  <ul>
    <li>[% m.name FILTER html %]
       [%+ '<span class="req_new">' IF db_new %]v[% m.db_version FILTER html %]
       [% '</span>' IF db_new %]
       </li>
    <li><strong>perl module:</strong>
      [%+ m.dbd.module FILTER html %] 
      [% '<span class="req_new">' IF dbd_new %]v[% m.dbd.version FILTER html %]
      [% '</span>' IF dbd_new %]</li>
  </ul>
[% END %]


[% BLOCK req_table %]
  <table class="req_table">
    <tr>
      <th>Module</th> <th>Version</th>
      [% IF include_feature %]
        <th>Enables Feature</th>
      [% END %]
    </tr>
    [% FOREACH req = reqs %]
      <tr>
        <td [% ' class="req_new"' IF new.contains(req.package) %]>
          [%- req.module FILTER html %]</td> 
        <td [% ' class="req_new"' IF updated.contains(req.package) 
                                     OR new.contains(req.package) %]>
          [%- IF req.version == 0 %]
            (Any)
          [% ELSE %]
            [%- req.version FILTER html %]
          [% END %]
        </td>
        [% IF include_feature %] 
          <td>[% req.feature.join(', ') FILTER html %]</td>
        [% END %]
      </tr>
    [% END %]
</table>
[% END %]
