If you have sites running on CubeCart v3 it’s time to update.
It appears that CubeCart version 3.xx is no longer working with the Paypal pro gateway.
We had a few order complaints on Whetstone Fly Fishing Outfitters a couple of days ago that people were unable to check out. It looks like the decision was made by Paypal to stop support for the Website Payments Pro IPN.
The only recourse available was for us to upgrade to CubeCart version 4. I’ve been scrambling, but we were able to make the upgrade and re-design the entire site to the old look in a little over 48 hours. My fingers are still smoking. 