http://bugs.winehq.org/show_bug.cgi?id=23180
--- Comment #22 from A Wine user RandomAccountName@mail.com 2010-07-10 07:46:20 --- (In reply to comment #20)
Does the attached patch help?
Unfortunately, no. At first, I thought it did, but it looks like something weird is going on with this game and KWin. The first time I ran it with the patch, everything looked fine. But the second time, the close button disappeared again. Some further testing shows that the close button is visible sometimes, and missing sometimes, regardless of whether I have that patch applied...
This discovery did cast some doubt on reverting the aforementioned commit being a solution (I could have just gotten lucky that time), but I tried running it ~30 times with that patch reverted and couldn't reproduce the problem that way.