No shutdown in F8/Gnome

[Clodoaldo]

I installed F8 with default Gnome and there is no shutdown button or shortcut.

I have already read this thread:
https://www.redhat.com/archives/fedora-list/2007-November/msg02444.html

I created the /etc/sysconfig/desktop file containing:
DISPLAYMANAGER="KDE"

but still no shutdown. Should I install some package to have kdm?
Isn't it a bug to not have a shutdown in a default Gnome install?

Regards, Clodoaldo Pinto Neto