samba - Feb 2004 - Samba 2.2.8a -> 3.0.2 upgrade: nmbd/dns proxy behavior changed!?

Hi!

After upgrading from samba 2.2.8a -> 3.0.2 on our samba pdc I see a
different nmbd behavior in handling dns proxy relevant request.
Initially nmbd is answering wins requests for dns names correctly.
Some hours later these entries seem to be forgotten!? Only pure wins
entries seem to remain in nmbd's positive answers.

In contrary samba 2.2.8a always answered dns proxy wins requests
correctly.

Was there any basic change in nmbd's wins/dns concept that i did miss?
Anybody else sees this?

Any hint appreciated,

Markus.