diff -r ec241d3a69ea -r 888871a071d9 web/formrenderers.py
--- a/web/formrenderers.py	Thu Apr 30 18:15:08 2009 +0200
+++ b/web/formrenderers.py	Thu Apr 30 18:31:43 2009 +0200
@@ -149,6 +149,7 @@
         if isinstance(field, HiddenInitialValueField):
             field = field.visible_field
         return (self.display_fields is None
+                or field.name in form.internal_fields
                 or (field.name, field.role) in self.display_fields
                 or (field.name, field.role) in form.internal_fields)