FIXED: Microsoft's release of version 12.1.3 fixed this error message. We highly recommend you have automatic updates enabled. Under the Help menu, select Check for Updates.
You may receive this message after logging in to Entourage 2008 version 12.1, also known as Service Pack 1. Although ominous sounding, you can safely click OK. The message is annoying, but there is no danger to your account.