So this two cracks developed - one is on the left palm rest and one is underneath center by the back right next to the fans... The one on the palm rest like cracked completely, a piece about 2 inches wide and 1/16 deep, and will probably just break off... It's right at the joint space... It's a CD2 Macbook I got first day it came out (last November), did not drop it (dropping it would have not caused the type of cracks here, they are specifically connected to the joint and the axis of pressure is different than experienced during a drop), so the cracks are basically stress cracks from lot's of typing on it (wrote my PhD dissertation on it). Did anybody else experience anything like that? Will the warranty cover that? If not, how much will it cost to change the palm rests?