http://bugs.winehq.org/show_bug.cgi?id=10980
--- Comment #2 from Lei Zhang thestig@google.com 2008-03-11 17:34:48 --- GdipGetPropertyCount is the only function missing now. As long as the user doesn't pass the /P argument, we won't trigger it.
GdipGetImageEncoders only encodes to BMP right now. So as long as you do that, the app works.
It works on my Ubuntu machines, but encoding to BMP somehow fails on my Slackware box.