Description of problem:
I preupgraded from F13 to F14. Now KDE logout dialog only shows "Logout", but no "Restart Computer" and "Turn Off Computer".
F14 switched to systemd, so my guess this is related.
Version-Release number of selected component (if applicable):
kdebase-workspace-4.5.0-2.fc14.i686
How reproducible: always
The output of:
ck-list-sessions
can help debugging the problem, especially if you're not using KDM. (KDM has its own shutdown/reboot mechanism. When KDM is not used, in Fedora, we use ConsoleKit to shutdown/reboot.)