Dean,
It would be a great feature for marketers who want to "mark" certain subscriber groups without starting a separate list, so please consider it for the next releases.
The problem is that when update_dupes is used, the script reports:
=====
The error messages are as follows:
That email address is already subscribed to this list!
=====
Is it possible to re-signup a subscriber with the same email and update a custom field at the same time?
Thanks