As described and verified by disecting w2K3 traffic, the field dns_hostname should contain the dnshostname of the workstation.
Created attachment 4498 [details]
Patch proposal in order to fix the pb
This patch fetch the dNSHostName attribute from the database using the workstation name.
Thanks, for pointing this out.
It will be fixed when my "compInfo" branch is merged.
I think the version numbers for SAMBA 4 Alpha/TP aren't worth to keep since we don't support any versions longer yet. Because all bugs filed will be propagated from version to version until they are fixed (for now at least) this field isn't necessary yet.
Should be fixed in "master".