I don't know if this is is a theme issue, if something have changed, or if I have just messed up the code doing things. But at the site I am building, "Website" is required in comments.
I use this theme http://themewich.com/aware/ and the latest version of wordpress. I can disable ALL of it, through the settings in comments in the admin section. But I do want E-mail and name to be necessary, which is probably quite normal.