--- dbtuner.admin.inc	2010-05-12 12:57:29.000000000 -0700
+++ dbtuner.admin.inc_762306_2.patch	2010-05-12 12:47:27.000000000 -0700
@@ -484,7 +484,7 @@ function dbtuner_views_filters_relations
       foreach ($filters as $name => $filter) {
         if (!empty($filters['type']['value'])) {
           foreach ($filters['type']['value'] as $key => $value) {
-            if (!empty($filter['table']) && !empty($filter['id'])) {
+            if (!empty($filter['table']) && !empty($filter['id']) && ($indexes[$filter['table']][$filter['id']] != 'none')) {
               unset($indexes[$filter['table']][$filter['id']]['node-type'][$key]);
               $indexes[$filter['table']][$filter['id']]['node-type'][$key] = $value;
             }