--- sites/all/modules/subscriptions/subscriptions_ui.module	2009-07-22 12:58:07.000000000 -0400
+++ sites/all/modules/subscriptions/subscriptions_ui.module.new	2009-07-26 16:22:47.000000000 -0400
@@ -296,7 +296,8 @@ function subscriptions_ui_node_form_subm
       call_user_func_array('subscriptions_write_subscription', $args);
     }
     else {
-      db_query("DELETE FROM {subscriptions} WHERE module = '%s' AND field = '%s' AND value = '%s' AND author_uid = %d AND recipient_uid = %d", $args);
+      $condition = array('module' => $args[0], 'field' => $args[1], 'value' => $args[2], 'author_uid' => $args[3], 'recipient_uid' => $args[4]);
+      subscriptions_delete_subscription($condition);
     }
   }
   $form_state['redirect'] = str_replace('/subscribe', '', $_GET['q']);