I have a handful of users (out of 250) that are receiving authentication
prompts when they login to their computers. All other users have
pass-through authentication from the Novell client.

There is nothing that all these users have in common (except that they
work here). They each print to different printers, they are located in
different buildings, they have different models of computers, etc.

Anyone have any suggestions? They are running Windows XP SP2 with the
4.91 SP4 client and the 5.12 iPrint client.