Index: sites/all/modules/lightbox2/lightbox2.module
===================================================================
--- sites/all/modules/lightbox2/lightbox2.module	(revision 14505)
+++ sites/all/modules/lightbox2/lightbox2.module	(working copy)
@@ -678,7 +678,8 @@
     'enable_video' => $enable_video,
   );
   if ($enable_video) {
-    $js_settings['flvPlayer'] = url(check_plain(trim(variable_get('lightbox2_flv_player_path', 'flvplayer.swf'), '/')));
+    global $base_url;
+    $js_settings['flvPlayer'] = check_plain(trim(variable_get('lightbox2_flv_player_path', 'flvplayer.swf'), '/'));
     $js_settings['flvFlashvars'] = check_plain(variable_get('lightbox2_flv_player_flashvars', ''));
   }