Comment 3 for bug 742341

This worked for me. I am running Ubuntu 10.10. I went to the AUX arrow to the right of the shutdown button. That brings up the menu for the GnoMenu settings utility. From there you can go to the commands tab and select the text for the shutdown dialog and edit it by removing the text that says "logout" and replace it with "shutdown". The program will then have to restart and your shutdown should work properly. I hope that this helps newbies like myself.