WordPress 3.1.3 has been released. This release is a security, and it is important that all users upgrade their sites as soon as possible.
From WordPress.org:
On May 25, 2011, WordPress 3.1.3 was released to the public. This is a security update for all previous WordPress versions.
For version 3.1.3, the database version (db_version in wp_options) remained at 17516.
To download WordPress 3.1.3, update automatically from the Dashboard > Updates menu in your site’s admin area or visit http://wordpress.org/download/release-archive/.
And please contact us anytime if you require assistance with your WordPress upgrade.