A few days ago I changed my username and it seemed to go fairly well. Today, however, I cannot connect any new servers. Nor can I log in to the website on any computer other than this one, which has a cookie stored.

I attempted to change my username back under this login, but the redirect page is blank and it doesn't seem to work. I tried to have the site send my login information to my email address on another machine but it also redirects to a blank page and I never get the email.

Am I hopelessly screwed up now?

I just successfully changed the password of my test account and I could still log in. Maybe you made a typo in the password (although you would have to do that twice).

Since you can still login on the system with the cookie you can retry entering the password on that one (this will not affect the cookie unless you log out on that system!)

Things are working today. The password recovery button no longer leads to a blank page and actually sends an email. New hosts can connect. Thanks.