Index: class-wp-comments-list-table.php
===================================================================
--- class-wp-comments-list-table.php    (revision 18581)
+++ class-wp-comments-list-table.php    (working copy)
@@ -311,7 +311,9 @@

        $this->user_can = current_user_can( 'edit_comment', $comment->comment_ID );

-       echo "<tr id='comment-$comment->comment_ID' class='$the_comment_status'>";
+       echo "<tr id='comment-$comment->comment_ID' ";
+       comment_class( $the_comment_status );
+       echo "'>";
        echo $this->single_row_columns( $comment );
        echo "</tr>";
    }