--- uc_discounts.module.orig	2008-12-09 12:48:25.000000000 -0500
+++ uc_discounts.module	2008-12-09 12:49:45.000000000 -0500
@@ -335,9 +335,13 @@ function uc_discounts_line_item_calc($op
 
       $script = "set_line_item('discounts', '". t('Discounts') ."', $discount_total, -1)";
       drupal_add_js('$(document).ready( function() { 
-        '. $script .' 
+        '. $script .'
+	if (window.getTax) { 
         getTax(); 
+	}
+	else if (window.render_line_items) {
         render_line_items(); 
+      }
       });', 'inline');
       break;
   }