http://bugs.winehq.org/show_bug.cgi?id=29401
--- Comment #6 from fracting fracting@gmail.com 2011-12-21 10:07:16 CST --- (In reply to comment #5)
The app changes the opacity several times to do a fancy transition effect. It works fine with XFCE, so yes, it's a Unity bug, it sounds like it doesn't refresh the opacity.
Thanks AJ, I'll file a bug to Unity. Hopes the Unity folks will have a look...