There are three problems I'm aware of. 1. Too long username 2. Username contains _ 3. Too long password All three cause "spinning forever" problem without a

There are three problems I'm aware of. 1. Too long username 2. Username contains _ 3. Too long password All three cause "spinning forever" problem without any notification what the problem actually was. Yeah, not the best sign up experience, I'll tell you that much. Apparently other people around here have noticed other ways for the signup process to fail.