+If you receive messages on the server complaining about "client ID already in
+use" when mounting from more than one client, check your /etc/hosts; if your
+hostname resolves to a non-global IP (like 127.0.0.1 or 127.0.1.1, or if you
+are behind NAT) this will cause such problems currently, and you will need to
+change or remove it for NFSv4 mounts to work correctly.
+
+ -- Steinar H. Gunderson <sesse@debian.org>, Wed, 11 Oct 2006 15:18:03 +0200