For some reason, the "automatically select the cheapest method" is not working. I'm not sure what I changed, but it suddenly stopped working. The cheapest shipping method's row is highlighted, but the radio button is not checked. Also, when I choose a method, the row highlight disappears for that row. I'm not receiving any javascript errors, and I'm not using the AJAX shipping. I'm using shipping_box.php. Any thoughts on what might be causing this?