I was trying to install webmin prom port tree and exteries on FreBsd 9.2. By default Fre Bsd comes with bind 9.8.4-P2.
there is no problem for installing and and using dns manager on webmin. But When you create a domain, you can view domain from named.conf and aa records from working path file.
But you cannot Display the domain on dns manager , only you can search and see the results.