I've a setup where ive an additional domain controller on Win 2K8 and Domai Controller on Win 2K3.... it's the additional DC (Win 2K8) whose DNS doesnt seem to work properly. if I do nslookup, it shows
Default Server: UnKnown
But if i ping a certain hostname on this machine, e.g. ping laptop.domainname.net, it can ping that successfully. I've checked the DNS entries and PTR records in the forward lookup zone and all the four entries of my hosts are there in both the DC as well as this additional DC. I've already run the adprep utillity to prepare the domain/forest for Win 2K8...Let me know if any additional info is required to troubleshoot this ! thanks ...