I have created a new WP blog in a subdomain and no one can comment unless they are registered. They get an error page with the msg:
Error: please fill the required fields (name, email).
The 'Comment author must fill out name and e-mail' in Options Discussions is ticked.
I have several WP blogs all running V2.03 and have never experienced this before.
Are there issues about using subdomains perhaps?