Alu 24" 2.4ghz when they first came out with aluminum, got it at the store. since august 07 My imac had a small yellow tint, i noticed, when i got it and it was not worth anyhting screaming about, i also noticed it had bleeding issues ath the bottom and sides. I wanted to return it or trade but i was convinced out of it. Now i noticed that from left to right their is a prominent yellow tint streaking it's way across and fading around the half way point. It is irritating and sad to see this display on this mac was ok, at first but it is geting slightly worse. I have apple care, can i trade this/replace it at an applestore, or would they need to fix it?