Re: preupgrade with Xfce spin ?
I upgraded 2 Fedora 15 XFCE systems to F16 using preupgrade. There were 2 issues. The first was that the entry for /bin/bash that should have been in /etc/shells was missing (double /bin/dash instead). I understand that is now fixed. The second is that the CUPS server is not starting. One can enable that easily enough with systemctl enable cups.service, which will set it to work after boot and systemctl start cups.service which will start it for the session you are currently in.
"We must understand the reality that just because our culture claims certain things are true it does not mean they are!" --M. Liederbach