After I installed a printer using the web-based CUPS interface, I attempted to print a test page. In doing so, I would get the following error:
Quota limit reached.
My solution was to run the following in a terminal window:
sudo lpadmin -p HPLaserJet8000N -u allow:root,user1,user2
Substitute 'HPLaserJet8000N' with your printer name. It can be found in /etc/printcap
According to the man page, it seems that you can allow anyone to print (I just haven't tested it yet), using the following command:
sudo lpadmin -p <printer name> -u allow:all
Hope this helps.