Just had a report from a user, which we have been able to verify on an independant mac, of an error at printer install time on Mountain Lion using iPrint client v5.06

The iPrint client reports:

iPrint encountered a problem trying to retrieve information from the printer
iPrint Printer - The printer cannot support the requested HTTP version.

Has anyone else encountered this?

The error was reported by Safari and Firefox on the users mac, and we have reproduced on Chrome (which I did not believe to work with the iPrint plugin?) and Firefox 5.