Same here - on dapper installed on April 10th. I tried all combinations of removing / and replacing by - (or empty space) and nothing worked!
The rest of the upgrade from breezy has been _very smooth_ however, this printer bug is puzzling to me. -- Installing printer with slash "/" in driver name fails https://launchpad.net/malone/bugs/32085 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
