Yes, it looks like it was forms (login form in particular), thank you.
Ended up adding this to def user() in default.py:
if not auth.user:
session.forget(response)-- --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.

