I just got a 2011 iMac today and hooked it up to my 10 month old LED Cinema Display. When I look at windows on each monitor, the right side shows more silver and the left is more tans. (for things like window borders) If I look at folders every other on the right looks almost light blue and blue, where on the iMac its more tan and purple. Its quite noticeable... not even close. I thought about calibrating but this doesn't seem to change anything. Had anyone seen this? Both are at max brightness. Is my new iMac bad?