Comment 2 for bug 973651

According to the terminal log, CUPS does not restart after the package update:

----------
Processing triggers for cups ...
start: Job failed to start
invoke-rc.d: initscript cups, action "start" failed.
dpkg: error processing cups (--unpack):
 subprocess installed post-installation script returned error exit status 1
----------

Please run the following commands in a terminal window:

  wget http://people.canonical.com/~pitti/tmp/cups.upstart.debug
  sudo cp /etc/init/cups.conf{,.orig}
  sudo cp cups.upstart.debug /etc/init/cups.conf
  sudo stop cups
  sudo start cups

This should fail again. Please attach /tmp/log here.

After that, please restore the original script again with

  sudo mv /etc/init/cups.conf{.orig,}

Thanks!