With 10.2.2, we could login without a network connection no problem, no zenworks login of course but you can use the machine.
After upgrading the client to 10.3 and trying to login workstation only it just sits at the novell client with the N seatbelt cursor animation.

Windows XP
Novell Client 4.91 SP5
No DLU, logging into a IDM sync'd Active Directory Domain

Logs in fine to the network(although slower than the 10.2.2 agent did)