Maybe I am wrong about AVG, then. I was sure I'd seen people complain about AVG detecting mIRC as a false positive. Perhaps it was people complaining about it detecting Invision as a false positive because of the DLL in it that I'm remembering instead.
I don't use AVG, so I am just going by what I have heard people saying. I've used McAfee for probably 10 years and have never had issues with them, so I have no desire to change to something else. That said, AVG is a great one if you want a free antivirus.