Use the nslookup and see if you are getting the full domain. Reply with the outcome.
C:\Users\booglehead>nslookup tiger
Server: UnKnown
Address: 192.168.0.1:53
*** UnKnown can't find tiger: Non-existent domain
C:\Users\booglehead>nslookup cheetah
Server: UnKnown
Address: 192.168.0.1:53
*** UnKnown can't find cheetah: Non-existent domain
The NetBT loaded on the local machine?
I assume your asking if NetBT is routing NetBIOS on the local machine. The answer is no. I've explicitly disable NetBIOS over TCP/IP. I opted for using FQDN's on my local lan. Does the D-Link even support this? So far, all signs are pointing to no.
I would hate to enable/run NetBIOS again; its slow (another filter on top of the TCP/IP stack) and ancient technology. Any other suggestions I can try --or is this a bug/issue in the latest 1.10 firmware? Thanks.