Hello, I just came back from the Genius Bar, had my rMBP screen replaced due to ghosting. The screen is okay (Samsung), however the computer is unusable, get 500% Kernel cpu usage all the time. Fans spinning like crazy and Geniuses were hopeless claiming it might be some sensors that got damaged. The thing is that I can't even have my Mac replaced here in Germany, because I have a different keyboard layout. Has anyone had simmilar experience? Is there any way to fix the problem?