Have you downloaded the very latest update from their website? I have noticed a few false positives popping up from time to time but nothing major. Grab the latest version for staters and if you still have the same problem then I would raise a ticket with their Tech support team to make them aware of what's happening.
Kaspersky Latest Version
You could roll back to the 2010 version if you wanted? I don't see that much difference in terms of protection tbh. They have tweaked the scanning engine and this is where the false positives are coming from I would say..
i could but i have seen a large increase in the speed of the scans
