The URL to the Security Advisory was incorrect.

template/en/default/pages/release-notes.html.tmpl

@@ -101,7 +101,7 @@
 <p>This release contains several security fixes. One fix may break any
   automated scripts you have that are loading <kbd>process_bug.cgi</kbd>
   directly. We recommend that you read the entire 
-  <a href="http://www.bugzilla.org/security/2.22.7/">Security Advisory</a>
+  <a href="http://www.bugzilla.org/security/2.22.6/">Security Advisory</a>
   for this release.</p>
 
 <h2><a name="v32_req"></a>Minimum Requirements</h2>