Thanks for reporting this important issue.Previous versions of s2Member are available here:
http://wordpress.org/extend/plugins/s2member/download/If you're running s2Member Pro, you can obtain previous versions of s2Member Pro from inside your account at s2Member.com. Also see this post:
viewtopic.php?f=36&t=2619That being said, I wouldn't recommend going backward. I would suggest that you go back over all of your
s2Member -> PayPal Options, including your account details, PayPal IPN integration, and Auto-Return PDT integration. Once your integration is completed, monitor your s2Member log files for any errors that occur during processing. Feel free to post your log entries here
( x'ing out any private information first please ), and we'll help you review them.
The lack of any log files would indicate to me that your Auto-Return PDT integration between s2Member and PayPal is incomplete in some way. Please review this section of your Dashboard.
s2Member -> PayPal Options -> Auto-Return/PDT Integration.
Also, please be sure that s2Member's logging/debugging routines are still active on your installation. See:
s2Member -> PayPal Options -> Account Details -> Logging/Debugging.