I would guess, given how many horror stories I've heard, that going from RH9->FC1 would involve not just a yum update, but also manual tweaking before you could do FC1->FC2, which would also require manual tweawking, and so on. Seriously, backup home and maybe /var/www - everything else, you can reinstall. You could even rpm -q > foo.txt to make sure you know what you had installed. -- MG
