I don't agree with avdven,

Till now I was a real MS user (Switch today to Linux LOL) Anyway, I've updated with SP1 and still had the same problem. I didn't use Zonealarm or Surfinshield. Also I check regular for updates on IE6.0. Still, I believe trying to switch to IE5.5 One of the reason is that it was very stable in use. But this just my opinion.