The server has just been updated to the new version of Attack of the B-Team.
If you had updated your client before the server is updated you will have problems. This will happen every time a new Attack of the B-Team update comes out.
Please stick to the current version until we announce the server has been updated. The server can take a long time to update and we want to be sure it's working properly. I also don't like jumping in and updating before a bunch of other servers have already tested it.
It works fine now. The forum is definitely the place to post any issues.