/* Definition des Standard-Avatars */
 
<?php $gravatar_default = "http://domain.com/images/avatar.gif"; ?>
 
/* Beginn der Ausgabe der Kommentare */
 
<?php foreach ($comments as $comment) : ?>
 
    <li class="commentbody" id="comment-<?php comment_ID() ?>">

    /* neu eingefügte Zeilen für Ausgabe des Gravatars */

    <?php $gravatar_url = "http://www.gravatar.com/avatar.php?gravatar_id=" . md5(get_comment_author_email()) . "&default=" . urlencode($gravatar_default) . "&size=40"; ?>
    <img class="gravatar" src="<?php echo $gravatar_url ?>" alt="Gravatar of <?php comment_author() ?>" />

    /* weiter mit der normalen Kommentarschleife */

    <?php comment_author_link() ?>
    <?php if ($comment->comment_approved == "0") : ?>
    <em>Your comment is awaiting moderation.</em>

    ...
 
<?php endforeach; ?>