--- sites/all/modules/timeline/timeline.theme.inc	2008-09-18 12:23:27.000000000 +1000
+++ sites/all/modules/timeline/timeline.theme.inc.new	2009-02-03 18:46:37.000000000 +1100
@@ -11,7 +11,7 @@
 function template_preprocess_views_view_timeline(&$vars) {
 
   // Establish initial focus.
-  $processed_fields = timeline_process_fields($vars['view']->query->fields);
+  $processed_fields = timeline_process_fields($vars['view']->query->fields,$view);
   $field = $processed_fields['start'];
 
   switch ($vars['options']['display']['focus']) {