The first and probably last bugfix for the 3.2 series. One important change is the way relative references in an included document are resolved, reverting back to the pre-3.0 behavior. Other areas with several bugfixes are support for Oracle databases, the rending engine, the WYSIWYG editor, and the Activity Stream. You can find the full list of issues fixed for this release at http://goo.gl/0hQOA
See http://www.xwiki.org/xwiki/bin/ReleaseNotes/ReleaseNotesXWikiEnterprise321 for more details.
See http://jira.xwiki.org/secure/IssueNavigator.jspa?reset=true&jqlQuery=category+in+%28%22Top+Level+Projects%22%29+and+fixVersion+in+%28%22%33.%32.%31%22%29+and+resolution+in+%28%22Fixed%22%29 for more details