Mesaj,
I am having the same problem. DBC issues with world server, though I can get auth and the btnet up fine. Oddly, I have the enUS client, but map extractor keeps creating an enUS and enGB folder. I also notice that the number of maps between each folder is different.
I have even tried deleting the entire build folder and recompiling the servers again from scratch, but it still will not work.
As for the client, I got the full client from Blizzard, so I doubt it is missing anything, and there are no more downloads coming in.
Sometimes I get a DBC issue, sometimes world server just crashes as I am trying to start it. I can't seem to get anywhere on it either.