Two things I noticed on my Win XP (can't post to the "Beta" forum for some reason).
1) Still hangs at XP shutdown
2) After Windows start it takes forever to start programs.
The "file shield" monitor shows that avast is scanning lots of programs all over the HDD.
Seems like it is scanning ALL programs that there are shortcuts for in the Start Menu.
Very annoying. Takes 5 minutes to get mail and web-browser up and running first time.