it does work, and you can authenticate to plan 9 using Inferno's factotum (or, if you're running Inferno on Plan 9, using Plan 9's factotum within Inferno).
the "bad fversion conversion ..." suggests that whatever you're running with aux/listen1 is spitting out something else before starting the protocol. plan 9's exportfs, for instance, has an extra textual `protocol'. if the Plan 9 service is exportfs, you might be able to use Inferno's import(4) to approximate that for you.
