http://bugs.winehq.org/show_bug.cgi?id=9771
--- Comment #112 from Brandon eff4eye@hotmail.com 2008-07-26 15:09:03 --- The ability to shift+tab (GameOverlayUI.exe) is a different bug (see bug 11319). For some odd reason it was called "unfixable" and labeled as WONTFIX. I am fairly certain (though I have not confirmed this yet) that this does in fact work in CrossOver games. If I can confirm that fact then I will post in 11319 that it is not impossible.