After some searching on the Internet I found debian bug number #585153,
which describes more or less the same
problem.
The solution for that problem (chmod go+rx /usr/lib/cups/backend) also
fixed my problem. I'm almost sure it will also
fix your problem.
See the bug #585153 for more details.
--
To UNSUBSCRIBE, email to debian-bugs-...@lists.debian.org
with a subject of "unsubscribe". Trouble? Contact listm...@lists.debian.org