Hi, I use my backlit keyboard, mainly on the lowest setting, just to give the keys some light. I've noticed today however that some of the keys aren't lighting up as much as they should. On the lowest setting (by pressing F6) the keys light up, but the following keys are dimmer than the others: m , . / ' ; l k. There are all around one area of the keyboard, to the right by the arrow keys. I'm still protected under Apple Care for a year, is it worth ringing them up and seeing what they say about it?