There is a problem with the shipping portion of my wordpress shopping cart. When a customer adds an item to their cart and then goes to check out, they are shown "billing" and "Shipping" fields where they can enter their information. Once that is entered there is a button link to my paypal account called "make purchase". When this is clicked the following error message appears:
Unable to process payment. Please contact the merchant as the shipping address provided by the merchant is invalid, and the merchant has requested that your order must be shipped to that address.
I called paypal and they determined the error to be from the "merchant" site and not a paypal error. Anyone have any ideas what is going on? I have successfully received payments through this shopping cart in the past and I am not sure what has changed to make this happen.