diff -r f63d090eb34a -r de0548cb0ab8 web/form.py
--- a/web/form.py	Thu Apr 30 01:21:48 2009 +0200
+++ b/web/form.py	Thu Apr 30 08:51:54 2009 +0200
@@ -421,7 +421,7 @@
 class EntityFieldsForm(FieldsForm):
     __select__ = (match_kwargs('entity') | (one_line_rset & non_final_entity()))
 
-    internal_fields = FieldsForm.internal_fields + ('__type', 'eid')
+    internal_fields = FieldsForm.internal_fields + ('__type', 'eid', '__maineid')
     domid = 'entityForm'
 
     def __init__(self, *args, **kwargs):