This is probably caused by the recent changes in HAL ad UDEV. I am not sure which of the two is now responsible for setting these ownerships/permissions.
Manually setting the group owenership with
sudo chgrp lp /dev/bus/usb/002/008
makes printing on my HP printer working again as long as I keep it connected and turned on (the two correct numbers you find via "lsusb").
This is probably caused by the recent changes in HAL ad UDEV. I am not sure which of the two is now responsible for setting these ownerships/ permissions.
Manually setting the group owenership with
sudo chgrp lp /dev/bus/ usb/002/ 008
makes printing on my HP printer working again as long as I keep it connected and turned on (the two correct numbers you find via "lsusb").