Comment Author E-mail Addy

I am using 1.2b, and was wondering how I get the comment authors’ e-mail addresses to show up when an e-mail is sent to me when they comment.
e.g. – Joe comes to my site, and comments. He enters his e-mail address, but it is not displayed on the site – however, when that e-mail is sent to me, the from box is empty, so when I reply – there is no address in the to: box.
Under my comments section, WP says:
Line and paragraph breaks automatic, e-mail address never displayed, HTML allowed…
So the e-mail address that the comment author leaves is left out in the “Reply-to:” or simply “From:” part of the e-mail.
It’s simply blank, and only started doing that with v1.2b.
Perhaps it is a bug of some sort, or a feature I can disable?
Thoughts?