ltsp-server - problems with client boot, how to debug?

Hello,

I've just installed a brand new Kubuntu and set up LTSP the Ubuntu way:
https://wiki.ubuntu.com/ThinClientHowto

Everything else is working, except that the boot up of the thin-client stops 
with error messages like these:

[...]
IP-Config: eth0 complete (from 192.168.1.1):
 address: 192.168.1.10   broadcast: 192.168.1.255   netmask: 255.255.255.0
 gateway: 192.168.1.1   dns0: 212.27.54.252   dns1: 212.27.39.134
 rootserver: 192.168.0.10   rootpath: 192.168.0.10:/opt/ltsp/i386/
Begin: Running /scripts/nfs-premount ...
Done.
nfsmount: need a path
Begin: Running /scripts/nfs-bottom ...
Done.
Done.
Begin: Running /scripts/init-bottom ...
Done.
mount: Mounting /root/dev on /dev/.static/dev failed: No such file or 
directory
mount: Mounting /dev on /root/dev failed: No such file or directory
Target filesystem doesn't have /sbin/init

--> goes into BusyBox and says:
/bin/sh: can't access tty; job control turned off



I've googled all the phrases here, checked all the logs, read 
documentation - yet I fail to find any useful information.

How can I debug this? What might be wrong?



Thanks for for a great distro,

-- 
| Otto Kekäläinen
| Osuuskunta Sange
| http://linux.sange.fi/