Hi I have had my 27" iMac since the start of the year and still well within Apple Care warranty (I have 3 years). I just got a 27" Cinema Display the other day to accompany my iMac and only now is it clear that my iMacs screen has a slight Yellow tinge. I had heard of the problems but I could never realise, my iMac alone looked marvellous, but now its sitting next to my new Cinema Display the colour difference seems pretty obvious. The whites on my Cinema Display are so pure compared to slightly yellowy whites on my iMac. I have a 2010/2011 iMac. If I was to contact Apple, would I be entitled to a replacement? What are your experiences? Thanks.