http://bugs.winehq.org/show_bug.cgi?id=16502
--- Comment #4 from Vincent Povirk madewokherd@gmail.com 2008-12-14 16:33:55 --- Created an attachment (id=17937) --> (http://bugs.winehq.org/attachment.cgi?id=17937) patch to ignore clipper windows
There were some changes to ddraw's clipping that I had some part in instigating (but that Stefan ultimately implemented). If a program sets a clipper with a window on the primary surface, our ddraw will generally draw to that window instead of the guess we would otherwise use.
Here is a patch to ignore clipper windows entirely. Does it have any effect?