[9fans] internal error when downloading installation image

[andrey mirtchovski]

$ wget http://plan9.bell-labs.com/plan9/download/plan9.iso.bz2
--2010-09-07 13:16:05--  http://plan9.bell-labs.com/plan9/download/plan9.iso.bz2
Resolving plan9.bell-labs.com (plan9.bell-labs.com)... 204.178.31.32
Connecting to plan9.bell-labs.com
(plan9.bell-labs.com)|204.178.31.32|:80... connected.
HTTP request sent, awaiting response... 500 Internal Error
2010-09-07 13:16:05 ERROR 500: Internal Error.