In Edgy this is fixed. You will get a clear error message if you choose a driver whose entry has no GhostScript command line.
** Changed in: foomatic-db-engine (Ubuntu) Status: Needs Info => Fix Released -- Error to configure printer driver with "foomatic-configure" https://launchpad.net/bugs/44003 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs