Index: wp-content/themes/twentyeleven/functions.php
===================================================================
--- wp-content/themes/twentyeleven/functions.php	(revision 17721)
+++ wp-content/themes/twentyeleven/functions.php	(working copy)
@@ -467,8 +467,15 @@
 function twentyeleven_comment( $comment, $args, $depth ) {
 	$GLOBALS['comment'] = $comment;
 	switch ( $comment->comment_type ) :
-		case '' :
+		case 'pingback' :
+		case 'trackback' :
 	?>
+	<li class="post pingback">
+		<p><?php _e( 'Pingback:', 'twentyeleven' ); ?> <?php comment_author_link(); ?><?php edit_comment_link( __( '(Edit)', 'twentyeleven' ), ' ' ); ?></p>
+	<?php
+			break;
+		default :
+	?>
 	<li <?php comment_class(); ?> id="li-comment-<?php comment_ID(); ?>">
 		<article id="comment-<?php comment_ID(); ?>" class="comment">
 			<footer class="comment-meta">
@@ -508,13 +515,6 @@
 
 	<?php
 			break;
-		case 'pingback' :
-		case 'trackback' :
-	?>
-	<li class="post pingback">
-		<p><?php _e( 'Pingback:', 'twentyeleven' ); ?> <?php comment_author_link(); ?><?php edit_comment_link( __( '(Edit)', 'twentyeleven' ), ' ' ); ?></p>
-	<?php
-			break;
 	endswitch;
 }
 endif; // ends check for twentyeleven_comment()
\ No newline at end of file