Am having trouble with the onepage checkout on an installation of v1.9.01 . Where the response of /checkout/onepage/saveBilling is blank. Form details are being passed through but the script effectively bombs out at a key point. The problem occurs in Mage/Checkout/Model/Type/Onepage.php if (($ validateRes = $ address->validate()) !== true) { return array(‘error’ => 1, ‘message’Read more