I personally don't believe that any AV software is perfect. Norton's is used by alot of peeps and as such any issues like false positives, which do happen alot with that software, become more noticeable. However even stuff used in thousands of commercial environments, including my employer, are subject to the same issues but maybe not as often. Once I had Inoculan, now called eTrust, tell me that mIRC was a virus. I knew it wasn't so I simply waited for new virus definitions to be released which sorted the problem.
One thing to always remember is that having an AV programme that does 'errr' occasionally is far better than having nothing at all.
