I just started having the same problem :shocking:
So, am I to understand that that actual order information is contained in the PayPal sessions information? I can't find any information on the order in the other tables, such as orders... :frusty:
I'll try the 'PayPal Sessions Viewer' to see if this gets me the order information as indicated. Hopefully that will get me what is needed to not have to contact the customer to find out what they ordered...
Then the next step, what could have changed in the communications channel between PayPal and my server? What do I need to be asking my host about, as I'm sure I've changed nothing on the site itself.
Everything was working fine within the last month and this week, it's happened twice. The other symptom is that just before this started happening, I started receiving 'IPN Debug message' emails. I'm receiving several per order.