Hello, I purchased a MB Core Duo back in July when they were first released, and to my luck was plagued with problems. I sent in my MB the first time for the whine and heat issue, bezel demalination, RSS, and discoloration. Apple Care fixed the problem promptly, and sent back my MB. All they did was replace the CPU heatsink and ignored the other problems. I was fed up with dealing with apple care and had to use my laptop for school so i just let it be. Three months later the whine and heat issue came back even after the update so i gave applecare a call back, I got in contact with Karey(super nice guy) and described my situation and told him how dissatisfied i was with my MB and so he replaced it with one of the newer C2D MB for free. I was totally stoked until i got from FedEX, Whenever i open the MB C2D it makes a cracking sound like two pieces of plastic are hitting, Just my luck. So i took a look to see what two pieces were rubbing and noticed it was the part between the display and the base(pictures are attached), and the same delamination is occurring. So my question is, Is this a know issue?, Should i let these problems go since they upgraded me for free, or should i give Apple Care a call back and get a repair or replacement? I am pretty bumbed about the whole situation,considering i had to already wait a week to get a replacement.