http://bugs.winehq.org/show_bug.cgi?id=17195
--- Comment #66 from Luca Bennati lucak3@gmail.com 2012-01-08 08:33:16 CST --- (In reply to comment #64)
In general I get err:ntdll:RtlDeleteResource Deleting active MRSW lock (0x112414), expect failure
As comment 65 by Dan Kegel says, not related to your changes, it already happens on vanilla Wine. It may just be that the python tests make Wine reach that code more often.