I constantly get this message on the address select drop down at the checkout pane.
Steps to reproduce:
Make sure there is at least one address in the addressbook.
On the checkout pane, select any of the previous addresses. Now select the default option (which says "-- Choose --").
This gives out a very ugly error saying: "Invalid data value given. Be sure it matches the required data type and format."
Any help would be appreciated here.
I am marking this as critical as it happens when the user is about to checkout.