--- a/web/form.py	Tue May 18 18:15:42 2010 +0200
+++ b/web/form.py	Thu May 20 10:40:29 2010 +0200
@@ -80,8 +80,6 @@
     __metaclass__ = metafieldsform
     __registry__ = 'forms'
 
-    internal_fields = ('__errorurl',) + controller.NAV_FORM_PARAMETERS
-
     parent_form = None
     force_session_key = None
     domid = 'form'