http://bugs.winehq.org/show_bug.cgi?id=35456
--- Comment #3 from Huang Wei hwei.sy@gmail.com --- (In reply to comment #2)
You can try using the X11 driver to confirm. Set this in the registry:
This solved the problem. Thank you. :)
I am also looking forward to a Mac driver solution in future. Because it better supports layered window and dock icons.