Line 187-192

// check that the currently selected shipping method is still valid (in case a zone restriction has disabled it, etc)
if (isset($_SESSION['shipping']) && $_SESSION['shipping'] != FALSE && $_SESSION['shipping'] != '') {
$checklist = array();
foreach ($quotes as $key=>$val) {
foreach($val['methods'] as $key2=>$method) {
$checklist[] = $val['id'] . '_' . $method['id'];