Ordered DiskWarrior...haven't received the emails yet.
Well, about a week or two ago I had my internal drive report header errors and eventually refuse to mount. I recovered the files and reinstalled, upgrading it from 10.2.5 to 10.2.6. Then soon afterwards, one of the partitions on my external drive wouldn't mount. Recovered and backed up both partitions wiped the drive and restored the files. Now the other partition on the external drive has become unmoutable.
Items I noticed before this happened though. The System started to display the clock in 24 hour time.....preferences started changing on their own....some windows displayed in Aqua while others in Graphite? and I think what trashed the other drive was (and this happens occasionally) my PB will go to sleep or in this case I closed the cover, but the sleep light will not go on, the screen goes blank, but I can still hear the drive or fan. Opening the cover or pressing spacebar and keys doesn't wake the machine and I have force reboot it.
hardware seems to checkout O.K.
I've reloaded with 10.2 now and will probably stay with it for a while.