VNC + GNOME with nfs mounted homedirs.

Hi!

I'm experiencing some disturbing problems with a machine at work.
I've got about 20 users and of which 15 uses VNC to connect to the machine for working with GNOME. The problem is that after a while it seems like the homedir get some nfs stales or something, gnome processes hangs and so forth.

I guess gnome is pure crap to use in this type of envrionment?

in /var/log/messages the following entrys apear:

rpc.idmapd[6669]: dirscancb: open(/var/lib/nfs/rpc_pipefs/nfs/clnt4d1): No such file or directory
automount[7037]: lookup_mount: lookup(yp): key ".view.dat" not found in map

is rpc.idmapd required on a NFS client?