http://bugs.winehq.org/show_bug.cgi?id=21832
--- Comment #1 from Vincent Povirk madewokherd@gmail.com 2010-02-23 09:07:30 --- This is two bugs. Things should work better if either one is solved.
1. The threading model should, indeed, be Both. We need to add proper locking to the objects so that they can function in a multithreaded environment.
2. Proxy/stub functions need to be implemented for the windowscodecs interfaces. That's bug 20220.