Over the past couple of days PayPal have been performing maintenance on their servers and they have updated their Instant Payment Notifications (IPN) software on their servers to version 2.6. It has come to our attention that since this release the CubeCart v4 code has stopped working if your store uses cURL rather than fsock to communicate with their servers.

Before this file update CubeCart specified the server path in a POST header. Since the IPN update the PayPal servers no longe…