4.7.3 theme_comment_form()

Does anybody know the implecations of why they took off the theme part of the theme_comment_form() function?

I have this function

function phptemplate_comment_form($edit, $title) {
$form = (is_file(path_to_theme(). 'comment_form.tpl.php') ?
_phptemplate_callback('comment_form', array('edit' => $edit, 'title' => $title)) :
theme_comment_form($edit, $title));
return _is_forum() ? '

' : $form;
}

and the theme_comment_form() is now comment_form() in the comment.module file.

The form information is comming through the $edit param just fine. What do I need to do to get this to return a themed reply comment for a forum?

I am new to this but a good php programmer so if you know a technical answer I can figure it out.

Peace, Mike