When the user completes their transaction on 2Checkout (2CO) and is returned back to my site (by clicking the "Finalize Order" button), the following error is shown in the message area of the page:

Warning: min() [function.min]: Array must contain at least one element in [path to my joomla install]/components/com_comprofiler/plugin/user/plug_cbpaidsubscriptions/controllers/cbpaidPayHandler.php on line 662

This is just above the success message that reads something like this:

Thank you for initiating the payment of...Your payment is currently being processed.

When I look at the user under the CBSubs "Subscription" screen I see him with a status of "Registered Unpaid", which is strange because the 2Checkout transaction completed successfully and notified me that all was well. And I even checked my credit card invoice and I do in fact see a charge by 2CO.

I am using:
Joomla 2.5.8
CB 1.9
CB Subscriptions 3.0.0

Yes it is of course installed or else I wouldn't be able to use 2CO in the first place. I installed it on top of the old (v2.0.2) copy (i.e. upgraded).

Can't use the CBSubs 2.x version 2CO plugin because that has its own problems: www.joomlapolis.com/forum/256-cbsubs-support/215348-3811-2checkout-not-returning-users-back-to-my-site

Very disappointing