So, here's the situation, I join Team9000 public build in the World of Minecraft client, loading screen runs, I successfully connect, I proceed to join the guest world with '/join guest,' the loading screen comes up, buggy as normal, flickering black, and just after it finishes I get a "Disconnect - lost connection to server.' This didn't happen with the older version of World of Minecraft client, but that doesn't work anymore. I am running Windows 7 Ultimate x64 and own a legitimate copy of Minecraft.