RH9 -> FC3: no upgrade offered

[m g]

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