Hi I took my 2010 27" iMac into the Apple Store on Monday and got it back today (Friday) with a replaced screen as it had a yellow tint. I have it setup at home again only to see it has the same issue again. Its really hard to see when the iMac is alone, but when its beside my Cinema Display, its day and night and drives me nuts! Anyone have experience with: 1. This issue? 2. Replacing your computer with Apple? 3. Have any advice? Thanks.