Moodle version 1.9.7+
I'm having a fairly serious issue with the Paypal module in 1.9.7, it appears to be correctly setup to operate in the Paypal sandbox (complete with changes in ipn.php to use port 443 and ssl://). I am getting no errors and paypal ipn history is showing a 200 response code. However, the payment is not logged in mdl_enrol_paypal, and the user is not added to the course.
This is likely the same problem encountered in http://tracker.moodle.org/browse/MDL-22016
Has anyone found a fix to this, or is the best recourse an upgrade?