We recently updated the software running the site to bring you more features and a modern new look.
The update involved a complete overhaul, which means there are side-effects, some anticipated and some not. One major change you may already have noticed: usernames no longer exist. To sign in, you can now use your email address or your Display Name.
Over the next few days, we will be working to get everything back to looking and working the way it should. We will post further announcements and articles on the subject in the coming days. If you have any questions or issues, please post in the Site Feedback forum or email me directly at email@example.com.