I just got my MBP yesterday, and so far it's been incredibly frustrating. Trying to download Firefox, 3 separate times, I get "image corrupted" errors when I try to open the .dmg. This is probably the 10th+ time it's happened today ... errors ranging from "invalid checksum" (from Facetime, downloaded from Apple), to "error -199". Any ideas what's going on? The same things appear to be just find on my Mac Pro, and they're running the same software. Already ran verify/repair disk multiple times. Thanks in advance.