There was a bug with the "update preference" page: The changing password feature didn't actually change your password, even if you got a message saying that your password was successfully changed. If you tried changing your password and got really confused when you couldn't log in anymore, it's because the site kept your old password. Hope you still have that registration e-mail!

That's been fixed now, so you can change your password for real this time. Posting user comments is NOT done yet, so don't be surprised if you try to post a comment and nothing happens.