Hi I recently purchased the macbook 12 inch 1.3ghz. I love the machine however I noticed yesterday my 'R' doesn't press down properly. That is all other keys have a certain click to it which helps gives feedback to you fingers that it has been clicked. I don't get this for the 'R' key. Has anyone else had this issue with other keys? Is it an easy fix? Could a bit a of compress air fix it?? Note: The R still works as an input to the screen. I am going to see Apple genius bar but the unit has become my main machine and I am concerned I will be without a machine for 3-4 days. This is a bit disappointing considering I've paid a premium for this unit. Any comments would be great.