I had an order come in that was to be shipped to Guam. In the cart administration, everything on the order looked fine. However, the "Billing State" in the database was filled with "USA".
Just thought I'd bring it to your attention.
When a country other than US or Canada is selected the state dropdown is replaced with a reqion textbox, the user must have entered "USA" in the textbox if that is what saved with the order.
-Scott