merlin, are you sure that your update is correct? Do you really have cups 1.3.11-1ubuntu1 on your system?
What is the output of
dpkg -S /usr/lib/cups/filter/pdftopdf dpkg -s cups
merlin, are you sure that your update is correct? Do you really have cups 1.3.11-1ubuntu1 on your system?
What is the output of
dpkg -S /usr/lib/ cups/filter/ pdftopdf
dpkg -s cups