As a result of the newest Bagle variants (Bagle.AG and Bagle.AI), McAfee has released two new sets of virus definitions in the SAME DAY. That's something I've never seen before by McAfee, and possibly by any other company. Both new variants made it to "medium" threat ratings in short order and the updated definitions were warranted.

For all antivirus users, stay current.

Hope this helps.