Ever since the hack, I can't log in. Going to the log in page and clicking "Login" just spins the delay spinner for a fraction of a second and then it turns back into a "Login" button without logging me in.

The js console shows "Failed to load resource: the server responded with a status of 400 ()" three times. And, indeed, manually accessing /api/v3/user/login gives me a 404 error.

I tried clearing cache and cookies for all time, I tried incognito mode, I tried from another computer. I tried creating a new user, and the new user could verify email and log in from the verify-email screen, but then if I logout and login to the new user through the usual process it fails again.

Help?