I am using Internet Explorer 8 with Windows XP Professional SP3, compatibility view enabled (duh
). It also sometimes happens while typing a message over here and the bad thing about that is that the whole message disappears and I have to type it over once again...
Internet Explorer 9 can't be installed on Windows XP I think, but if you want me to, I could see how it performs on Windows 7 + IE 9.
I am not sure when the last time was that his compatibility thing happened to me, but I think it did happen yesterday. As soon as it happens again, I'll let ya know!