Shutdown button only allows you to log out of system

Right after installing GNOMENU on Ubuntu 10.10, all functions of the menu work as they are supposed to, accept for the "shutdown" or "power" button. It does not matter what theme is used, the only function it will allow access to is to switch user or to log off. You cannot power down or restart the computer from inside GNOMENU. On previous installs this function worked like it should, but on this latest install it does not. I tried uninstalling and re-installing from a different source, but got exactly the same results.