Ok, thanks. Unfortunately you can't boot the Powerbook 12" from the Diskwarrior CD, so that's, unfortunately not an option.

Just in case you are interested, the file that was cross-allocated was : /users/paulhaigh/com.apple.recentitems.plist.

It was overlapped with /var/log/system.log

I've removed it in single user mode, but the UNDEFINED error remains.

fsck still can't do anything.

Cheers,

Paul.