WordPress MU

I do not know why I have two gravatars displayed at the blog site of my wpmu system.

I turned off gravatars plugins, but they are all still there. And I turned off the blog's comments gravatar and do not allow gravatar to display, still does not work.

So I think it is the problem of the skin, and I checked skin's comment's file. There seems nothing wrong. Here is the code.

<div class="gravatar">
<?php
$url;
$title;

if( !isset( $comment->comment_author_url ) && $comment->comment_author_url == NULL ){
//echo "URL is not set...";
$url = "http://site.gravatar.com/";
$title = "Sign up for a Gravatar at: " . $url;

}else{
$url = $comment->comment_author_url;
$title = "Visit " . $url;
}
?>
<?php
$email = get_comment_author_email();
$default = get_bloginfo('template_directory') . "/images/default_gravatar.gif";
$size = 64;

$grav_url = "http://www.gravatar.com/avatar.php?gravatar_id=" . md5($email). "&default=" . urlencode($default) . "&size=" . $size;
?>
" rel="comment author" title="<?php echo $title; ?>"><img src="<?php echo $grav_url; ?>" alt="<?php comment_author(); ?> - Gravatar" class="gravatar" />
</div>

<p class="top"><?php comment_author_link() ?><span>  |  <?php comment_date('F jS, Y') ?> at <?php comment_time() ?> " title="">#<?php edit_comment_link('edit','  ',''); ?></span></p>

<div class="body">
<?php if ($comment->comment_approved == '0') : ?>
Your comment is awaiting moderation.
<?php endif; ?>
<?php
if(the_author('', false) == get_comment_author())
echo "<div class='body-author'>";
else
echo "<div class='body'>";
comment_text();
echo "</div>";
?>

</div>

You can check the site at

http://my.textjourney.com/isentive/2008/10/02/%E5%BD%BC%E5%B2%B8%E8%8A%B1%E5%BC%80%E5%AE%A3%E8%A8%80/#comment-2

And I seriously doubt it is the problem of the plugin, since another blog at my site has the same problem

http://my.textjourney.com/ahwei/2008/09/29/xiaoerjing-%E5%B0%8F%E5%85%92%E7%B6%93-%D8%B4%D9%90%D9%8A%D9%8E%D9%88%D9%92-%D8%B9%D9%8E%D8%B1-%D8%AF%D9%8D/#comments

but mine seems OK
http://my.textjourney.com/eric/2008/09/22/amazing-jump/#comments

very weird, your kind help will be highly appreciated!

I see some gravatar code there just fine. That's what's showing the gravatar. Remove it and it'll be gone.

Thank you! The problem has been fixed. This is due to duplicate plugin which has been turned on in mu-plugin. Thank you andrea_r. I always read your posts.