If you think avast! is bad you should look at Qihoo. It's a FP's madness. But they conveniently provide different version to testers than they do to users so results are different. From my experience avast! has always been great with false positives and never had many of them at all. Only thing that's somewhat bad at is how long it takes to make a verdict on submitted files via Virus Chest, be it FP or suspected malware...