User mobile home on server

Hi,

I set up my users as mobile users with a network home of /NetworkUsers. Everything including the synchronisation works fine when those user worl on a computer in the network.
But when logging into the server. The login itself is ok, even the NetworkUsers share mount and display when mobile preferences are managed by computer list. When managed by user the finder hangs!?!
But home sync freezes the machine for some minutes (even mounts from other machines fall over).
Is this a bug or a feature?
Greetings
Jürgen