Closing, thanks for checking again! The loopback interfacte is in /e/n/interfaces by default, so this seems to be a local configuration error.
** Changed in: gnome-cups-manager (Ubuntu) Status: Needs Info => Rejected -- gnome-cups-add freeze https://launchpad.net/bugs/64663 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs