Index: modules/filter/filter.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/filter/filter.module,v
retrieving revision 1.160.2.10
diff -u -p -r1.160.2.10 filter.module
--- modules/filter/filter.module	17 Sep 2008 19:14:19 -0000	1.160.2.10
+++ modules/filter/filter.module	24 Sep 2008 16:16:33 -0000
@@ -503,7 +503,7 @@ function filter_admin_format_form_submit
     if ($checked) {
       list($module, $delta) = explode('/', $id);
       // Add new filters to the bottom.
-      $weight = isset($current[$id]->weight) ? $current[$id]->weight : 10;
+      $weight = isset($current[$id]->weight) ? $current[$id]->weight : -10;
       db_query("INSERT INTO {filters} (format, module, delta, weight) VALUES (%d, '%s', %d, %d)", $format, $module, $delta, $weight);
 
       // Check if there are any 'no cache' filters.