As a comment to my above comment, the Debian CUPS server is untouched, no updates have been applied to it for weeks, so some Dapper update has touched something that affects our system.
The printer is a HP PSC 1510 and we also use the "hplip" package for the printing process. -- Printing broken by Updates of 2006 Aug 1 https://launchpad.net/bugs/55205 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs