There is a new virus running around, you can find the patch for W32.Beagle.K@mm on the Symantec site.

From the site:

W32.Beagle.K@mm is a variant of W32.Beagle.J@mm that opens a backdoor on TCP port 2745 and uses its own SMTP engine to spread through email. It also sends the attacker the port on which the backdoor listens, as well as the IP address. W32.Beagle.J@mm also attempts to spread through file-sharing networks, such as Kazaa and iMesh, by dropping itself into the folders that contain "shar" in their names.