You might want to make sure you AV is up to date...

[catocom]

Avg, and Mcafee, both had major updates today.
I'm not sure what other AVs did, but I recommend making sure
(those at least) are up to date as of the 2nd.
I just got in 2 comps that were updated to 5-22, and 5-28,
that had brand-new viruses on them, and the were doozies.

From AVGs site.....

Added detection of new viruses Win32/Decon, Win32/Sculament, Worm/Dextro and more trojan horses. Added detection of new variants of Win32/Mintop, Worm/Dabber and new variants of trojan PSW.Dumarin, Startpage.
- June 02, 2004 -