can you post the full traceback of your error? I have seen some cases where similar errors appear on GAE with list:reference fields, but i don't want to send you on a wild goose chase.
the thing i am thinking of is that on GAE when you have a list:reference the
table that you reference must have a format string:
db.define_table('dad',Field('name'),
format='%(name)s')
not sure that it would be at all related here though.
cfh
