This is a problem with an application I develop, so I can't expect users to upgrade their X11 or do complicated stuff. I packaged Wine and everything into a nice little bundle so it's easy. If I have them install and config a ton of stuff nobody will ever use it. I'm running the latest updates on 10.6 and I can't get images to sync so i'm pretty sure that the funcationaly isn't in the OS X X11 yet. Maybe when it gets updated I'll get the functionality but until then I'll just have to disable it on the Mac bundle.
