I am at a loss as what to do. I recently purchased the latest iMac 21.5 and absolutely love it..except! ..I have encountered dead pixels on..would you believe 3 occasions on 3 different screens. I have returned two screens which developed dead pixels within a week of use and now..tonight my third screen is breaking out with dead pixels. I really don't know what to do. I just feel that if I return this one (apart from feeling silly) that it will probably happen with the next one. Am I just having some strange run of bad luck..or is this problem more common than I think. The store assures me it is very unusual. This is extremely frustrating to say the least.