=== modified file 'plugins/views_plugin_query_default.inc'
--- plugins/views_plugin_query_default.inc	2009-10-19 01:40:21 +0000
+++ plugins/views_plugin_query_default.inc	2009-10-20 18:54:20 +0000
@@ -851,7 +851,12 @@
       $sub_group = $info['type'] == 'OR' ? db_or() : db_and();
       foreach ($info['conditions'] as $key => $clause) {
 
-        $sub_group->condition($clause['field'], $clause['value'], $clause['operator']);
+        if ($clause['value'] != NULL && $clause['operator'] != NULL) {
+          $sub_group->condition($clause['field'], $clause['value'], $clause['operator']);
+        }
+        else {
+          $sub_group->where($clause['field']);
+        }
       }
       $main_group->condition($sub_group);
     }