I am running Gnome-Shell (3.2.1) and the Super Key doesn't show the Activities overview when I push it. This problem only happens when there are no windows open.
I can mouse to the top left and show the Activities overview, but not with the super key. It just stopped working recently.
I've disabled the Super key shortcut in Unity, but that didn't help. I've played around with the settings in System Settings -> Keyboard Layout -> Layouts -> Options -> Alt/Win Key Behavior, but nothing fixed it.
If I go to System Settings -> Keyboard -> Shortcuts, I can't bind the Super key to the "Show the activities overview" option under "System".
Running Ubuntu 11.10