This guy's issue is what I have:
QUOTE
On the three XP machines I installed to, one has a significant problem. I already rolled back to IE7 once yesterday, and I’m about to do it today. My problem seems different from what you describe: IE8 is extremely slow to launch. IE8 crashes when I try to close it without waiting for the complete launch.
http://www.edbott.com/weblog/?p=2443 Comment #30.
No one seems to be getting my problem.
Looks like he does have the same exact problem as me:
QUOTE
The new IE slowed user logon an extra 20 seconds in addition to being slow to launch itself. I wonder what the deal is. I suppose I could reinstall IE8 RC1, but I won’t bother.
Same website. Comment #33, same person.