Can you look in your AI War data folder (the folder in the big long textbox under Settings), and see if there are any error text files in there? Most likely there is a Direct3DLobbyDrawError.txt file, or something along those lines, which should help us to figuring this out. It's apparently something really rare and specific, as we can't duplicate it and no one else seems to be having the same problem. A reinstall of the game probably wouldn't help, unless there is some sort of missing asset or something, but we can't really know until we see whatever error files it happens to be logging, which should tell us pretty definitively what is up. Sorry for the trouble you're having there!