When logged into my account (admin) when I press Shift + 1 I dont get anything appearing on the screen . I do get a sound (frog) every so often . When I log into any of the other accounts set up on the MB ,it works as it should do ,and I get a ! .I havent changed any keyboard shortcuts .Pressed Restore Defaults anyway . Edit : Just booted up in Safe Mode and its OK . Now, I dont use the ! too often so not sure how long its been like this . The only thing I installed yesterday was the update for ITunes.