Welcome to NFS
The Network File System (NFS) has existed in one version or another since 1985. The OpenSolaris implementation includes support for NFS versions 2, 3 and 4. NFS version 4 is the area where most of the development activity exists. There is ongoing work within the IETF in interpreting the current NFSv4 specification and defining extensions or minor versions for NFSv4.
The very nature of NFS, sharing of filesystems, has led to the development of an NFS community that consists of the various platform implementations. Once a year, that community comes together to do interoperability testing at Connectathon'(TM)'.
See the XNFS docs here:
Visit the discussion forum
For Linux specific NFS Issues there is a mail list here
on 2009/10/26 12:08