I'm almost 2 weeks in with a Macbook Pro, and its still crashing at random times. The crashes happened more frequently with only 512mb RAM, and its been better lately with 1.5 gigs. I've had crashes while playing with Adobe Lightroom, Firefox, Safari, iTunes, etc. I can't explain them beyond that the screen starts greying out, and I have to reset, no other options. I don't seem to be pushing the computer hard at the times, and sometimes its not even to warm. Last night with Firefox I was reading a forum, though the battery was getting low. What bothers me, is for all Windows problems, it seems much more stable then OS X so far. At least when Windows apps crash, they very, very rarely bring down the OS itself. Usually the rest of the applications run fine. I very rarely see OS X applications crash without being forced into a reboot. I'm skeptical its a memory problem, as the problem has occured less since I put in extra Crucial RAM (instead of the Apple provided 512). This is a refurbished Macbook Pro that I ordered. I really like OS X in general, and the laptop, and want to go forward with it, but I think unless I can find a good way to solve the issue in the next day (before the return period is up), Apple may lose a convert. So, ideas? How do I debug? Is my laptop just bad?