I'm getting my Mid-2007 Macbook replaced under Applecare, but I have a question about user-upgradeable parts. My Macbook shipped with 1GB installed RAM, but after experiencing daily kernel panics under OSX and blue screens of death under Windows Bootcamp, I went out and spent over $100 on 4GB of Kingston 800Mhz DDR2 RAM. I now understand that this is not the same type of RAM that comes with the Late 2009 models, and is therefore incompatible. My question is what happens now? I was having problems with my RAM before I went out and bought my own, is that money now wasted? Or if I ship it with the 4GB to Apple will they offer me some sort of compensation for having to go and buy my own RAM on a computer that eventually, a few months later, would turn out to be so faulty it needed to be replaced?