Does this just affect recurring subscription payments?

I am using the standard Paypal processing in vB 3.8.7 PL3 and it still seems to be accepting payments. There have only been a few in the last week, but all of them including one yesterday appear to have credited to my paypal account and added the subscription in vBulletin.

I don't have any Paypal related mods or plugins.

Thanks for this fix in any case! I'm holding on to 3.8 as long as possible, but will probably have to make a change eventually. Seems I'm not the only one lol.

Confirming that a one-time subscription payment was successful on October 10, using the default paypal system and no mods or updates. Payment was received and the member's forum account was updated as expected. On October 4, a recurring paypal subscription payment was credited to my Paypal, but did not communicate to vB3.8 to update their subscription. No error or any other type of warning was issued.

Why hasn't vBulletin updated yet there script with this yet...

It has been, 4.2.2 is up to date. I think the 3.8.8 beta has it too.

FYI though it seems PayPal never enforced this change- no one has reported failed payments even without this change. But better to be prepared then to wake up and see all your transactions failing one day.