So the topcase of my Macbook has cracked again on the right palm rest. At the moment, it is being held on by tape. The bottom portion of the laptop, where the topcase meets the macbook body is also cracked. There is a hairline fracture from the far left portion of the laptop till the middle, where the indent starts for your fingers to go in to open the case and again where the topcase cracked. I have an appointment with the Genius Bar later today and was wondering what the chances are of them replacing the entire bottom portion of the laptop.