Index: wp-includes/comment.php
===================================================================
--- wp-includes/comment.php	(revision 15962)
+++ wp-includes/comment.php	(working copy)
@@ -854,7 +854,7 @@
 		// Don't count post-trashed toward totals
 		if ( 'post-trashed' != $row['comment_approved'] && 'trash' != $row['comment_approved'] )
 			$total += $row['num_comments'];
-		if ( in_array( $row['comment_approved'], $known_types ) )
+		if ( in_array( $row['comment_approved'], $known_types, true ) )
 			$stats[$approved[$row['comment_approved']]] = $row['num_comments'];
 	}