-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.
+use" when mounting from more than one client, check that you have at least
+mount version 2.12r-14. Also, connecting from behind different NATs could cause
+this kind of issue currently, as two or more clients would believe they had the
+same IP.