Just ponied up last week and bought my first Imac only to discover after a couple days that it had the dreaded yellowing screen. Tonight I spent 2 hours backing everything up and reboxing it all. Drove an hour to the Apple store. Exchanged it for another Imac and after unboxing at home and setting it all up gues what.................same friggin yellowing screen. Guess this is a sign to wait for the new Imac upgrades or something because I am beyond pissed right now 