There were a few issues whose fixes didn't make it into 1.22.0, but we should be able to address them within a couple of weeks. I've been making a list of the issues that should be fixed in 1.22.1: https://www.mediawiki.org/wiki/MediaWiki_1.22/Known_issues
Please feel free to suggest additions to the list. You can even make the additions if you are sure the problem will be rapidly addressed, but I or another person on the release managment team may revert your edits.
The list currently has the following items:
* The installer doesn't work for extensions on Windows. * There is a problem with Postgres support. bugzilla:46594 https://bugzilla.wikimedia.org/show_bug.cgi?id=46594, bugzilla:47055 https://bugzilla.wikimedia.org/show_bug.cgi?id=47055, bugilla:49523 https://www.mediawiki.org/w/index.php?title=Bugilla:49523&action=edit&redlink=1 (User:Saper https://www.mediawiki.org/wiki/User:Saper thinks these can be fixed by providing "FOR UPDATE table" support.) * Handle explicit plural forms in custom convertPlural in language classes https://gerrit.wikimedia.org/r/#/c/99088/. * Installer reports undefined $nofollow https://gerrit.wikimedia.org/r/#/c/99654/
Thanks,
Mark.