When in the "Sale Items" category (/shopping_cart/index.php?_a=saleitems) can not add a product to the basket.   I or customers, have to click on the product, then click add to basket.   In debugging mode, this is what I get:   PHP: [Warning] /home/"usr"/public_html/shopping_cart/includes/lib/smarty/sysplugins/smarty_resource.php:325 - filemtime() [function.filemtime.php]: stat failed for /home/"usr"/public_html/shopping_cart/skins/kurouto/js/common.html