This problem can be worked around by typing "sudo dpkg -i /var/cache/apt/archives/cups_1.3.9-2ubuntu4_i386.deb" to downgrade to the previous version. After this, go into aptitude and mark cups to be held at its current (downgraded) version.
This problem can be worked around by typing "sudo dpkg -i /var/cache/ apt/archives/ cups_1. 3.9-2ubuntu4_ i386.deb" to downgrade to the previous version. After this, go into aptitude and mark cups to be held at its current (downgraded) version.