i've installed the iprint client version 5 on a mac running 10.5.8. the client installed fine and printers can be added without authentication. printers with authentication fail with an error message from safari or firefox stating "the connection was aborted by either the server or client"

the command line gives a debug message-
IPRINTInterpretURI for lpd://<server address>/ - Unknown Port Type - lpd

any ideas?