This milestone adds various responsive UI improvements for the new Flamingo skin, a new structure for applications created with Application Within Minutes and the possibility to have alternative Icon Themes. Developers also get a new Mail Sender API and other API improvements. Finally, a considerable amount of bug fixes (31) and improvements (31) are provided so make sure to try it out.
Full release notes available at http://www.xwiki.org/xwiki/bin/view/ReleaseNotes/ReleaseNotesXWiki62M1
See http://jira.xwiki.org/secure/IssueNavigator.jspa?reset=true&jqlQuery=category+in+%28%22Top+Level+Projects%22%29+and+fixVersion+in+%28%22%36.%32-milestone-%31%22%29+and+resolution+in+%28%22Fixed%22%29 for more details