Went to the Genius Bar at my local Apple Store today. My iMac's CR key has been sticking so I decided to ask the experts. The genius knew his stuff and has resolved the problem. Good job, Apple Store.
Later... The Canadian GP was "normal"... brake problems and dirty off line - bad luck Jacques! At least ITV showed the whole thing despite the world football thing which seems to pervade our very existence! There is still time to close that gap, Michael!
