Sat, Mar 05, 2005 at 08:01:58AM +0000, martin@netbsd.org:
> Synopsis: NFS server broken in -current
> 
> State-Changed-From-To: closed->open
> State-Changed-By: martin@netbsd.org
> State-Changed-When: Sat, 05 Mar 2005 08:01:57 +0000
> State-Changed-Why:
> Sorry to insist, but the problem still persists for me, even with
> $NetBSD: ip_output.c,v 1.145 2005/03/05 02:46:38 briggs Exp $

I was only about to reproduce it by increasing the udp send space on the
server and running ls -R on the client.  The mount always worked from me.
That is with a sparc64 client.

Could you provide any other environment specifics?  ipf/pf, ipsec, or a
router involved?