I cannot create an bustadice account 
Invalid user name. error message is showing up whatever username I would like to choose And I've tried in 3 different browsers :|
Invalid user name. error message is showing up
whatever username I would like to choose And I've tried in 3 different browsers :|Unfortunately I'm not able to reproduce that. What user name are you trying to use? Is it possible that the name is actually invalid and that the error message is not a bug?