We didn't do that modification for the cart module. You need to edit the file "cart" of the view product via the menu Display->Views and change the lines:
$namekey = $field->field_namekey;
echo '<p class="hikashop_cart_item_'.$namekey.'">'.$this->fieldsClass->getFieldName($field).': '.$this->fieldsClass->show($field,$row->$namekey).'</p>';
by:
if(!empty($row->$namekey)){
$namekey = $field->field_namekey;
echo '<p class="hikashop_cart_item_'.$namekey.'">'.$this->fieldsClass->getFieldName($field).': '.$this->fieldsClass->show($field,$row->$namekey).'</p>';
}
The links to the product page have been changed in the latest version. But you should not have any problem as the links on the products listings are generated by HikaShop so it also uses the new way. If you want to restore the old way of generating the links, you need to change the file components/com_hikashop/router.php with the previous version of that file that you can find in the folder front of your previous version install package.