I've done a search on google and these forums and have only found a few results on google. http://www.mac-help.com/forums/showthread.php?t=4210 http://forums.macosxhints.com/archive/index.php/t 20 3C/t-74630.html http://www.macusersforum.com/lofiversion/index.php?t18345.html (I think the last two guys are the same) Has anyone else had this problem? Cause it just happened to me twice within the last couple of days on my new MBP, and I have a MacBook that I bought May last year and I've encountered it once or twice with that one too. A restart fixes the problem for me (It didn't for one user on the forums in the links), but it's pretty annoying when you're writing a paper and all of a sudden typing h hides Word. Here are my symptoms: Clicking spotlight - constantly get the system alert noise Clicking an app on the Dock: Opens the applications folder and selects the application corresponding to the dock. Selecting files: Acts as if command key is held down. Moving windows: Acts as if command key is held down (you can move windows in the background, they will not become active) "Are you sure you want to shutdown" screen - constant system alert beeps.