http://bugs.winehq.org/show_bug.cgi?id=6971
--- Comment #220 from Vincent Povirk madewokherd@gmail.com 2009-01-17 22:37:59 --- I don't think that such a patch is likely to be accepted, even if it works. If the thread with the DGA mouse grab becomes nonresponsive, it becomes impossible to move the mouse until that program is killed (and maybe longer). I've been told that Wine won't do X mouse grabs for a similar reason.