I have an imac running OS 10.8.2 with a bluetooth keyboard. I have had it for about 8 weeks. When I hit the right shift key, all the open windows run off the screen and I am looking at the desktop. When I hit it again, the windows come back. I have taken the batteries out of the keyboard and restored the keyboard shortcut defaults. I don't have a trackpad and nothing seems stuck. Suggestions?
Is this setting enabled?
Just open the mission control, go to shortcut and click in show desktop F11 and put right shift and next click again and select F11, Done.