It may be just one isolated transaction but here's a heads up.

I use Selling Mgr Pro and I have a sale sitting in the unpaid list with an awaiting PayPal payment icon.

Only problem here is that it has been paid and shows up as such in my PP account.

For some reason there is a communication breakdown between Selling Mgr/ebay and PayPal.

Anyone waiting on protracted payments might be well advised to check PP manually.