So I think I've figured out the problem. As you may notice, my username is Sauerkraut_RoB. I went to create a new account, and it says 'usernames and passwords may only be letters and numbers, no special characters'. So, this policy must've changed from allowing special characters to not allowing th...

I can log into multiplayer, but it says "Server Error: 6" under my games. When I try to make a challenge and sent to my friend, it says "Authentication Failed". I'm guessing it means that it can't contact the server, because I am able to sign in. Are servers down? Is there a prob...