Hey, all. So I've had a love/hate relationship with my Rev A Macbook Air since summer of 08. I bought it as a secondary machine and, while I suffered many of the same issues that other folks did (constantly overheating kernals, core shutdown, etc) it never was too much trouble since it wasn't my primary. I had to have essentially the entire computer replaced this summer when it suffered the hinge issues other people have had. This new machine has been even more troublesome than the previous one, with regards to kernal_task of up to 180+%, sometimes as soon as I turn the computer on. It was shortly after I got this replacement that I started a new job where I travel for a living. Suddenly my secondary computer is my primary. It has become intolerably bad. I had one appointment at an Apple store where they tried everything up to and including a complete clean install of the most recent OS, all to no avail. I've since been documenting the problems I've been having (Screenshots, quicktime vids) so that this coming Monday, at my next appointment in a new city, I can make a strong case that the computer is a lemon and get them to give me a new one. At this point, though, I'm tired of the Revision A machines. I don't want to chance it with another. I know there have been people who have gotten upgraded to newer models with enough complaining, but I'm having trouble finding the threads. Any advice or links to similar situations would be helpful. I don't need a shiny, top-of-the-line machine. I bought a base model Rev A and would be more than happy with a base model Rev B, so long as it can do something like browse Safari for more than 30 minutes without locking up my whole system. I'm still under my AppleCare, and I've been a good Apple customer for nearly a decade, purchasing something like 4 iMacs, 4 laptops, and close to a dozen iPods and iPhones for myself and my family. What do I need to do to get them to replace my failing machine?