A new release of WordPress just hit the presses. Version 3.12 fixes a bug that allowed contributors to improperly publish posts on self hosted WordPress blogs.
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 that missed the boat for version 3.1.1.
You can update, as always, through your dashboard or by downloading the latest release from the WordPress website: WordPress.org