Had same problem (9.04). did the following (don't know which one helped):
1. Added a folder named "${HOME}/PDF".
2. chmod 755 ${home}/PDF
3. sudo apt-get remove cups-pdf
4. sudo apt-get install cups-pdf
5. sudo aa-complain cupsd
after step 5 it worked, don't know if the earlier steps were necessary.
Had same problem (9.04). did the following (don't know which one helped):
1. Added a folder named "${HOME}/PDF".
2. chmod 755 ${home}/PDF
3. sudo apt-get remove cups-pdf
4. sudo apt-get install cups-pdf
5. sudo aa-complain cupsd
after step 5 it worked, don't know if the earlier steps were necessary.
Regards,
- Aviv