To be clear, I fixed this problem by 1) logout so you see the login screen 2) click "options" (the button which lets you configure the login screen; but on some themes, you go to Actions and find "Configure the login manager" 3) enter root password 4) on the General tab, there is a button "edit commands" (bottom right) 5) edit the Command "Suspend command" to be /usr/sbin/pm-suspend
optional: Edit one of the custom commands to implement hibernate. The path is /usr/sbin/pm-hibernate 6) Apply command changes -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]