We've now started our first NW65sp2 DNS server. Our primary is NW51sp6
running 200 zones.

Are there any issues/gotchas in introducing NW65 DNS into a 5.1 environment?

Using just a few test zones, the new 6.5 server does not load zones
unless they have a designated primary server specified in the zone
attributes page of the dns console provide with NW65.

Apart from that, initial queries to the new server lokk as though they work.

Any feedback, experiences welcome.