Whenever a workstation is imported manually via NWAdmin, after rebooting
the workstation the user can no longer log into the workstation unless
he/she logs in and deletes the Workstation Object from the registry under
Software->Novell->Workstation Manager->Identification. After rebooting
the workstation then logs in without a problem but as soon as it is
imported again it no longer becomes useable again.

This was a problem since SP4 was applied, as before then under SP3
workstation import worked fine.