With NW6SP2 and NW6SP3 I could add and local entry into the SYS:ETC\HOSTS
file and have the server resolve the name for the workstations. Now with
NW6SP4 this no longer works.

To get a resolve to work, I added the local entry into a DNS zone as a 'A'

What's different about NW6SP4 which breaks this good feature?