Hi, I've not used this for ages,
but updated to karmic and found my printer did not work.
I've managed to get it to work by deleting the printer from Administration>Printing
and starting over..
This time I had to install libstdc++5 manually as it's not on karma
from here http://packages.debian.org/etch/libstdc++5
and choose your architecture (if you choose the wrong one it'll tell you when you try to install after downloading) then continent
I then did the process, but this wasn't the end, as i got some error messages and could not print.
it seemed to set the wrong permissions for some files and thus i was told that filter was insecure etc
so to change the files to the correct user (of root)
type into terminal
chown root [FILE]
chgrp root [FILE]
and replace the word [FILE] with these files and directories:
and do both commands for each file,
hope this gets your printer working!