Hello all, long time listener, first time caller... I just bought a new 15" MBP and I am contemplating the need for a cover for my palmrests. I know that some computers have issues with the palmrests becoming discolored with use. I do not want this to become the case with my new MBP. Does anyone know if this is an issue w/ the new, unibody, aluminum MBP? If so, then I will have to find some way to protect my palmrests. (Also, I bought a black Speck SeeThru Satin hardshell case for the MBP so if anyone has any thoughts on it, feel free to let me know. It's currently in being shipped to me.) Thanks!