Thanks Krileon. I've read the documentation but unfortunately, since Paypal has changed their interface recently, the instructions in the manual in and your posting here for enabling PDT are no longer correct. The proper procedure is now:
- Log into PayPal.
- Click My Account | Overview.
- Click My Business Setup (on the right-hand side).
- Click Customize my buyer's experience.
- Locate Auto Return and Click Edit.
- Enable Payment Data Transfer.
- Click Save.
I've attached a screenshot of the settings showing PDT enabled.
So, PDT is enabled, and I'm receiving IPN notifications. What other settings can have an effect?