WordPress just released a Security Update for its .org owner operated software.
The release is primarily a security update for media uploads that puts in checks during the upload process and verifies the users credentials.
There are also some functionality updates in the Taxonomy code. Fixes to both searches and use of permalinks or url structures have been fixed.
If you are a rare IIS6 Server user there have also been fixes concerning specific problems when using WordPress with this webserver.
Automatic update is probably your easiest solution for updating to this new version.
If you have modified default themes or files you should make a backup before you install.
