<?php
// Produces an avatar image with the hCard-compliant photo class for author info
function thematic_author_info_avatar() {
    global $wp_query; $curauth = $wp_query->get_queried_object();
	$email = $curauth->user_email;
	$avatar = str_replace( "class='avatar", "class='photo avatar", get_avatar("$email") );
	echo $avatar;
}
?>