Once AIM is on your computer, you can’t get rid of it. It’s like herpies for Windoes. Just because the registry cleaner “removes” it doesn’t mean it’s completely gone. It may not be visible to the user but there’s parts of AOL in all sorts of hidden cubbies of the registry.
FF3 is “out of beta” but from the complaints I’ve been seeing it should have had a 10th or so beta before being released. I’m sure it won’t get anywhere near the bad rap Vista got for being undertested.