So I've been having some issues with my 3 week old macbook. I see graphic artifacts when using iMovie and playing flash games. My caps lock key is unresponsive sometimes and I've had battery issues. I went to the apple store to see a genius, and they offered to replace the machine with a new one. Problem is, I have 1.5 gb RAM (1x1 gig chip, 1x512 chip) and I left the original other 512 chip at my brothers place, who is out of the country. Unless I can get the original 1 gig of ram (512x2 chips), they won't accept the machine for a exchange with a new one. They will still send it in to have it fixed but i'd rather have a new one. Do you think that, if I take one 512 chip out and leave the current 1 gig chip, they'll even know?