My AV, Command CSAV from Authentium, ( the one that Norton doesn't know about
) Posted deffiles for this yesterday. It has auto updated the deffiles 4 times in the past 36 hours. The latest one about an hour ago, it related to W32/Bagle.I@mm As yet no reference to this can be found on the Symantec web site.
Checking deffiles would appear to be essential on a daily basis if you do not have "Auto update enabled" at the moment.