I suspect this issue was solved when portmap version 6.0.0-2, but am unsure if it is true. Please test and see if the issue is solved.
Happy hacking, -- Petter Reinholdtsen -- To UNSUBSCRIBE, email to debian-bugs-rc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org