I have trouble-shot this serveral times. No, I didn't have anything downloading, and my internet is only moderately fast. I have enough ram. NOTE: If your unfamiliar with a mac, please don't post suggestions. They're not helpful. This on the other hand, might be:
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_PROTECTION_FAILURE at 0x00000000bf104ffc
Crashed Thread: 0 Dispatch queue: com.apple.main-thread