=== modified file 'themes/engines/phptemplate/phptemplate.engine'
--- themes/engines/phptemplate/phptemplate.engine	
+++ themes/engines/phptemplate/phptemplate.engine	
@@ -84,12 +84,14 @@ function _phptemplate_callback($hook, $v
  *   A sequential array of variables passed to the theme function.
  */
 function _phptemplate_default_variables($hook, $variables) {
-  global $theme;
+  global $theme, $base_url;
   static $count = array();
   $count[$hook] = isset($count[$hook]) && is_int($count[$hook]) ? $count[$hook] : 1;
   $variables['zebra'] = ($count[$hook] % 2) ? 'odd' : 'even';
   $variables['id'] = $count[$hook]++;
 
+  $variables['base_url'] = $base_url;
+
   global $sidebar_indicator;
   if ($hook == 'block') {
     $count['block_counter'][$sidebar_indicator] = isset($count['block_counter'][$sidebar_indicator]) && is_int($count['block_counter'][$sidebar_indicator]) ? $count['block_counter'][$sidebar_indicator] : 1;