http://bugs.winehq.org/show_bug.cgi?id=9029
------- Additional Comments From anders@straadt.dk 2007-09-08 08:42 ------- Sorry, I'm a bit new at this... but with Ville's excellent detective work tracking down this regression plus the fact that this bug had a very peculiar nature (mouse only visible in certain areas) it was quite easy to fix the bug; Ulrich had tried to simulate OpenGL scissoring code for some reason, and this code made it possible for the requested GL state and the actual GL state to go out of sync. I believe I have fixed this.
I'll also try to mail this patch to the wine-patches list.
I disagree that this bug depends on 4437 - it has nothing to do with msvcrt as far as I can tell.