Wordpress Users - Upgrade to 2.1.2, Pronto!
Particularly if you upgraded to 2.11 quite recently (over the past 3-4 days). Apparently some of the files on their server were hacked and some security exploits were added. Find out more here:
http://wordpress.org/development/2007/03/upgrade-212/
Upgrading Wordpres is a breeze so it shouldn't be a problem to keep up with the latest version. Iet us know if you need help with installation. I recommend the WP-database backup plugin. It helps a lot when upgrades come around