Hi Jason,
I found an issue involving the "Refund / Reversal" Notification.
As you know, when refunds occur, Paypal refunds some fees, but not necessarily 100% of them.
The amount of FEES refunded to the seller is included in the IPN for a refund, but it is not available as a "Custom Replacement Code" in the Refund / Reversal Notification.
Please add this, as it is a necessary figure to know for accurate bookkeeping.
Thank you very much. Regards, Marty