Anyone who has still problems with printers not getting re-enabled when turning them on, please replace your file
/usr/lib/hal/scripts/hal_lpadmin
by the attached file and make it executable with
sudo chmod 755 /usr/lib/hal/scripts/hal_lpadmin
Then unplug and replug your printer. Does it get re-enabled now?
If this helps, your problem would also be bug 341646.
Anyone who has still problems with printers not getting re-enabled when turning them on, please replace your file
/usr/lib/ hal/scripts/ hal_lpadmin
by the attached file and make it executable with
sudo chmod 755 /usr/lib/ hal/scripts/ hal_lpadmin
Then unplug and replug your printer. Does it get re-enabled now?
If this helps, your problem would also be bug 341646.