http://bugs.winehq.org/show_bug.cgi?id=12127
--- Comment #2 from Dmitry Timoshkov dmitry@codeweavers.com 2008-03-20 19:37:50 --- (In reply to comment #0)
And -- here's the awesome part -- the problem can infect any windows on the desktop at the time, giving them a very strange "click on me to send me to the back" behavior, even after you quit wine!
Isn't that suggests that's a WM bug?