Try deleting this code by redefining it as "local"
if (isset($params['qty'])) {
$filter = new Zend_Filter_LocalizedToNormalized(
array('locale' => Mage::app()->getLocale()->getLocaleCode())
);
$params['qty'] = $filter->filter($params['qty']);
}
\code\core\Mage\Checkout\controllers\CartController.php ( 183)
\code\local\Mage\Checkout\controllers\CartController.php
, ""
if (isset($data['qty'])) {
$cartData[$index]['qty'] = $filter->filter(trim($data['qty']));
}
\code\core\Mage\Checkout\controllers\CartController.php ( 428)
, \code\local\Mage\Checkout\controllers\CartController.php
, ""
if (isset($params['qty'])) {
$filter = new Zend_Filter_LocalizedToNormalized(
array('locale' => Mage::app()->getLocale()->getLocaleCode())
);
$params['qty'] = $filter->filter($params['qty']);
}
\code\core\Mage\Checkout\controllers\CartController.php ( 327)
, \code\local\Mage\Checkout\controllers\CartController.php