I have to agree with many users that have floppy scanning problem, as I do too.
I installed Avast internet security 5.0.545 to try how it works on a friends machine. It scanned floppy every time I clicked on My computer. The same thing happened on my machine, after uninstalling avast 5.0.545 free and installing the is version. On the first one the system was just installed, so there wasn't any crap on it. My system is in use for about a year. This is to show that this isn't a matter of software configuration other than avast is 5.0.545 on the system.
I am an Avast free user, but I would like to see this fixed, because I think that Avast internet security is a good piece of software and it's a pity to be spoiled by something like this.
Many regards