This release candidate brings many Flamingo skin improvements to better present Nested Documents on top of the Nested Spaces concept. Similar improvements were made in applications like Solr Search, AWM, FAQ, Activity Stream and the Skin editor in order to be compatible with Nested Spaces. On the developers side, a new Select widget and a document displayer were added to allow richer UIs to be created. Last but not least, 41 bugs were fixed in this release on the road towards the coming final 7.2 release.
Full release notes available at http://www.xwiki.org/xwiki/bin/view/ReleaseNotes/ReleaseNotesXWiki72RC1
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.%32-rc-%31%22%29+and+resolution+in+%28%22Fixed%22%29 for more details