Index: modules/system/system.module
--- modules/system/system.module.orig	2008-04-09 23:11:49 +0200
+++ modules/system/system.module	2008-05-23 10:41:26 +0200
@@ -1431,7 +1439,7 @@
   if (is_numeric($action)) {
     $aid = $action;
     // Load stored parameter values from database.
-    $data = db_fetch_object(db_query("SELECT * FROM {actions} WHERE aid = %d", intval($aid)));
+    $data = db_fetch_object(db_query("SELECT * FROM {actions} WHERE aid = '%s'", $aid));
     $edit['actions_description'] = $data->description;
     $edit['actions_type'] = $data->type;
     $function = $data->callback;