So here's the deal. Last weekend, my white Macbook was requiring a software update to 10.5.8. So I said, go for it and let it restart. That's when the trouble happened. It began to restart but just stuck on the gray apple screen with the gear circle thing spinning. I tried several times to restart, but it never worked. I did all the things I knew to do (boot from DVD and run disk utility to repair permissions, zapped PRAM, ran it in the fsck thing; Booting in safe mode wouldn't work). Nothing helped. So I booted from my backup and used SuperDuper to rewrite my boot drive. (I guess I should point out that when booting from my backup, I was able to access all my files on my internal HD, it just wouldnt boot). After doing that revert thing to 10.5.7, everything worked fine. So then I tried to update again this weekend. Same thing happened. I've tried the same steps. I can still get to anything I've added to my regular drive since my backup and all that. Just won't boot from that main drive. Any ideas?