I read on the forum, some people got their polycarbonate on the lower part replaced of their black macbooks. I just want to inform you guys that I just got my keyboard, trackpad, and the lower part of the polycarbonate replaced, not just the polycarbonate. When i say lower part i mean the whole piece where u put your palms and upwards. I went in to the genius bar, because my charger randomly stopped working, and the genius offered a free replacement on the macbook. This was w/o applecare, and no dues at all, as simple as that. Take ur blackbook into the genuis bar!