Looks like another bad one! Update your virus definitions, run checks!

"Bagle computer virus unleashed Computer users are being warned about a new virus which has spread at 'an alarming rate'.


Internet security firm MessageLabs says it has detected more than 70,000 copies of the W32/Bagle-mm virus in the past 24 hours.
The computer virus, or worm, is contained in infected emails as an attachment.

The aim of the worm is to spread further by looking for new email addresses in the infected computer, such as in the user's list of contacts."