Please update to cups 1.4.5-1ubuntu4. In the previous versions the CUPS daemon is crashing with segmentation faults a lot and also does not work at all if the Avahi daemon is not running, due to bugs in the new Avahi patch. With the mentioned version I succeeded to fix these bugs and the CUPS daemon has the expected behavior now.
Please update to cups 1.4.5-1ubuntu4. In the previous versions the CUPS daemon is crashing with segmentation faults a lot and also does not work at all if the Avahi daemon is not running, due to bugs in the new Avahi patch. With the mentioned version I succeeded to fix these bugs and the CUPS daemon has the expected behavior now.