I did a fresh install after
slipstreaming SP2 into my XP Pro install CD.
I ran the pop-up blocker and firewall through some tests. The pop-up blocker is equivalent to the built-in firefox .9, and the firewall showed no open ports. Much improved. I'm still trying to test it's performance. I understand they changed some things about how it handles memory and stuff. If anyone has more info/links about this it would be much appreciated.
I also tested out the new wireless things. It seems good, unfortunately, I'm using a card that likes to crap out randomly. But I like what I saw.
What has everyone's experience been without doing a clean install, but using the upgradde instead? Does it leave things messy or screw up any programs?