Index: wp-includes/comment-functions.php
===================================================================
--- wp-includes/comment-functions.php	(revision 3426)
+++ wp-includes/comment-functions.php	(working copy)
@@ -634,10 +634,11 @@
 				$post_links[] = $link_test;
 			elseif(($test['path'] != '/') && ($test['path'] != ''))
 				$post_links[] = $link_test;
-			do_action('pre_ping',  array(&$post_links, &$pung));
 		endif;
 	endforeach;
 
+	do_action('pre_ping',  array(&$post_links, &$pung));
+
 	foreach ($post_links as $pagelinkedto){
 		debug_fwrite($log, "Processing -- $pagelinkedto\n");
 		$pingback_server_url = discover_pingback_server_uri($pagelinkedto, 2048);