WordPress 3.1.2, was released on April 26, 2011 and is a maintenance & security release.
This release addresses a vulnerability that allowed Contributor-level users to improperly publish posts.
We suggest you update to 3.1.2 promptly, especially if you allow users to register as contributors or if you have untrusted users. This release also fixes a few bugs.
If you need assistance with upgrading, please schedule your WordPress upgrade today via our WordSprung WordPress Upgrade Service.