Weird.
As I type this message right now, I don't have any problems but once you surpass this text box and the scroll bars become active, it's game over.
Could you guys try and quote some wall of text or just see if you have same problem when there is a lot of text ?
To answer the IE8 question, I don't have to use IE8 but I'm used to it, I have mozilla on this computer also, but tend to never use it for some reason.