[gentoo-user] New wireless adapter breaks nfs exports

[walt]

This machine (my nfsv3 file server) just got a new wireless adapter, which
works fine for everything except serving files :(

mount.nfs: requested NFS version or transport protocol is not supported

google shows me lots about slow nfs connections over wireless but nothing
about non-support.  I'm using only nfs3 ATM because I've had so many problems
with nfs4 in the past.  I thought I'd ask here if nfs4 might fix the problem
before changing everything.

Any other ideas would be most welcome too.

Thanks.