This is a stabilisation release focusing on the Nested Pages feature which was introduced in XWiki 7.2.
Lots of polishing has been done for the Nested Pages feature integration, targeting the consequences on the UI redesign and the changes at applications level. The release includes a couple of bug fixes, a few dependency upgrades and new UI extension points available for extension developers.
Full release notes available at http://www.xwiki.org/xwiki/bin/view/ReleaseNotes/ReleaseNotesXWiki73
See http://jira.xwiki.org/secure/IssueNavigator.jspa?reset=true&jqlQuery=category+in+%28%22Top+Level+Projects%22%29+and+fixVersion+in+%28%22%37.%33%22%29+and+resolution+in+%28%22Fixed%22%29 for more details