version 2.2.2.
So it’s time to update your sites according to the guys at WP.
Today we have two security-related releases available for both users of our main 2.2 branch and the legacy 2.0 branch. As these releases include only security and minor bugfixes they should not cause any plugin or theme compatibility issues, so you have no good excuse not to upgrade. Matt at WP
So download the latest version and check out the files that have changed.