ComboFix Trojan???

I've had ComboFix on my PC since May 24th (2009), downloaded directly from BleepingComputer.  Have never run it; had it sitting there just in case.  Today's (5/30) Antiphishing definition updates (20090530.005) were auto downloaded at 12:51:34 PM and ComboFix was removed by Auto-Protect at 12:55:44 PM, branded a Trojan and quarantined!

 

Anyone else have this occur on their PC today?  Hmm, will Malwarebytes and SuperAntiSpyware be the next to be zapped?