I have a mid-2007 white macbook that I bought used last year. I have had absolutely no problems with it until a few days ago... First, safari froze (spinning beach ball). I only had 2 tabs open (cnn and facebook) and Mail. Not much going on, it has never froze like that so I let it sit for about 10 minutes. It was still spinning when I came back so I did a hard shut down (held power button). I tried to turn it back on about a minute later but it wouldn't go past the grey screen...and then the lovely folder/question mark came up. Joy oh joy. So I booted from the install disk and it said my hdd was not mounted. I ran disk utility and it gave me these errors: -Invalid node structure -Volume needs to be repaired -Error: The underlying task reported failure on exit then I hit "repair" and it said: -Invalid node structure -Rebuilding catalog B-tree -The volume could not be repaired Grrr. Tried a few more times and same result. I also reset the PRAM and SMC. No luck. Also I tried to boot up from cd again yesterday and it wouldn't boot up, it kept ejecting the disk. I also tried diskwarrior, and again, it ejected the disk. I called tech support at apple and he told me to leave it alone until they could look at it, obviously whatever the problem is, is getting worse. I bought a firewire cable in hopes that I could mount it in Target Disk Mode to my iMac and save some photos...the fw symbol appeared on the macbook screen but my iMac didn't detect anything attached to it. I'm not too worried about losing my data since I don't have much on there except full resolution photos from the last few months...but it would be nice to recover those if the hdd is toast. I think I've learned my lesson to back it up more than 4 x a year. Anyway, I have an appointment at an apple store tomorrow but I just wanted to see if anyone had any suggestions of what to do at this point. Thanks.