http://bugs.winehq.org/show_bug.cgi?id=11582
--- Comment #13 from Drew Bugs bugs.drew@yahoo.com --- Created attachment 47211 --> http://bugs.winehq.org/attachment.cgi?id=47211 Return immediately from ShowWindow if hiding a previously hidden Window
I believe the attachment address AF's analysis. The program goes a bit farther, but the second thread gets caught in a Debug loop.
Should the patch be submitted to wine-patches?