I had so far 3 LCD repairs/replacements on my 27-inch iMac with discoloration and blotchy spots. kind of looks like liquid stains (no, liquid was not spilled on this mac). the last few repairs resulted in scratches to the iMacs glass, back and top...okay whatever, cosmetic. but so far 3 LCDs and this one after 2 months is exhibiting the same issue. I never had to bring in a system more than once prior to this..is this something to escalate with AppleCare or is continually bringing it back the best method?? ...i'm trying to give apple the benefit of the doubt but quite frankly knowing that their store techs are just a bunch of kids with no technical background handling these machines is worrisome.