CMD + tab not working between apps I recently upgraded to OS 10.8, and now when I try to switch between apps using command + tab the quick switch menu (not sure what its called) to the app after toggling to it, but it never actually switches over.  I then have to click on the app in the dock.  I tried looking in the keyboard menu, what is causing this?
I believe that the Dock is the process responsible for running the application switcher. It might help to remove the Dock preferences (~/Library/Preferences/com.apple.Dock.plist), and log out/in. However, this may require you to repopulate your Dock with the current Applications and settings.