Ok it went away now. it was doing that after shutting down all windows and apps, and then starting up IE and going to that thread, and then scrolling fast with the scroll-bar..
But now it doesn't do it. Must have been nothing. I thought it was some kind of an error, but I guess not.
edit- I should say though that after it did that- I posted my post there- and I got the IE error- and IE shut down..
DH Error
I still get that once in a while. Maybe it has something to do with that.. I dunno.