Comment 10 for bug 152504

I can confirm this bug to. It looks like since the app is launched by a regular user, when they try to perform a system-wide action that normally requires root user access the password dialog prompts for the user password for localhost, which even if the user has administrative permissions nothing will work and the user is forced to cancel.

The only way I managed to get my printers configured is by rummaging through alacarte (the menu editor) to find the command this gui app uses (system-config-printer) and then run it from the command line with gksu. This should not be happening!