This is the second and last milestone of the XWiki 4.3 version. This release brings a new and experimental Solr Search engine, new default date, user and group pickers, a new localization module allowing applications to register
translations, REST API additions and various other improvements.
See http://www.xwiki.org/xwiki/bin/view/ReleaseNotes/ReleaseNotesXWiki43M2 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%34.%33-milestone-%32%22%29+and+resolution+in+%28%22Fixed%22%29 for more details