This bug is due to Unity completely bypassing Compiz to intercept Super+otherkeys events. It's a design problem with Unity, which I didn't think anyone would be willing to fix very soon. Because it means rewriting all the Super+key handling in unityshell.cpp.
See: UnityScreen::InitHints in unityshell.cpp and ShortcutController.cpp.
This bug is due to Unity completely bypassing Compiz to intercept Super+otherkeys events. It's a design problem with Unity, which I didn't think anyone would be willing to fix very soon. Because it means rewriting all the Super+key handling in unityshell.cpp.
See: UnityScreen: :InitHints in unityshell.cpp and ShortcutControl ler.cpp.