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A number of people have complained about the situation where root can log onto the configuration server, but not its clients. Login proceeds normally, then a window with "Workspace error Internal error (signal 10)" pops up. Other users are not affected.
This scenario occurs with NetBooted clients that are not permitted root access to / via the server's /etc/exports file, either via an explicit root= option or (the most heinous) anon=0. For security reasons many sites will NOT want to permit such access.
Note that what you're up against is only a Workspace Manager misfeature; there's no problem logging in as root on the real UNIX console, or logging in as a non-root user and then using "su" to obtain root privileges.
Root access is needed to:
It is not required to perform updates on the local NetInfo database, for any normal user operations, nor to run programs requiring root access on the server using -NXHost.