diff --git a/classes/Cart.php b/classes/Cart.php
index 0a62438f7..84f0dd789 100644
--- a/classes/Cart.php
+++ b/classes/Cart.php
@@ -423,7 +423,7 @@ class CartCore extends ObjectModel
 						p.`id_manufacturer`, product_shop.`on_sale`, product_shop.`ecotax`, product_shop.`additional_shipping_cost`, product_shop.`available_for_order`, product_shop.`price`, p.`weight`,
 						stock.`quantity` quantity_available, p.`width`, p.`height`, p.`depth`, stock.`out_of_stock`, product_shop.`active`, p.`date_add`,
 						p.`date_upd`, IFNULL(stock.quantity, 0) as quantity, pl.`link_rewrite`, cl.`link_rewrite` AS category,
-						CONCAT(cp.`id_product`, cp.`id_product_attribute`, cp.`id_address_delivery`) AS unique_id, cp.id_address_delivery,
+						CONCAT(cp.`id_product`, IFNULL(cp.`id_product_attribute`, 0), IFNULL(cp.`id_address_delivery`, 0)) AS unique_id, cp.id_address_delivery,
 						product_shop.`wholesale_price`, product_shop.advanced_stock_management');
 
 		// Build FROM
@@ -1507,7 +1507,6 @@ class CartCore extends ObjectModel
 				// If the cart rule offers a reduction, the amount is prorated (with the products in the package)
 				if ($cart_rule['obj']->reduction_percent > 0 || $cart_rule['obj']->reduction_amount > 0)
 					$order_total_discount += Tools::ps_round($cart_rule['obj']->getContextualValue($with_taxes, $virtual_context, CartRule::FILTER_ACTION_REDUCTION, $package, $use_cache), 2);
-
 			}
 			
 			$order_total_discount = min(Tools::ps_round($order_total_discount, 2), $wrapping_fees + $order_total_products + $shipping_fees);
diff --git a/config/smartyadmin.config.inc.php b/config/smartyadmin.config.inc.php
index 556f9d373..fbf14a214 100644
--- a/config/smartyadmin.config.inc.php
+++ b/config/smartyadmin.config.inc.php
@@ -28,6 +28,10 @@ global $smarty;
 $smarty->debugging = false;
 $smarty->debugging_ctrl = 'NONE';
 
+/* Smarty should be in compile check mode in the BackOffice */
+$smarty->force_compile = false;
+$smarty->compile_check = true;
+
 function smartyTranslate($params, &$smarty)
 {
 	$htmlentities = !isset($params['js']);
diff --git a/modules/blockviewed/blockviewed.php b/modules/blockviewed/blockviewed.php
index 1b723e1c4..cea191e82 100644
--- a/modules/blockviewed/blockviewed.php
+++ b/modules/blockviewed/blockviewed.php
@@ -49,9 +49,9 @@ class BlockViewed extends Module
 	public function install()
 	{
 		if (!parent::install()
-			OR !$this->registerHook('leftColumn')
-			OR !$this->registerHook('header')
-			OR !Configuration::updateValue('PRODUCTS_VIEWED_NBR', 2))
+			|| !$this->registerHook('leftColumn')
+			|| !$this->registerHook('header')
+			|| !Configuration::updateValue('PRODUCTS_VIEWED_NBR', 2))
 			return false;
 		return true;
 	}
@@ -95,7 +95,7 @@ class BlockViewed extends Module
 		$id_product = (int)Tools::getValue('id_product');
 		$productsViewed = (isset($params['cookie']->viewed) && !empty($params['cookie']->viewed)) ? array_slice(explode(',', $params['cookie']->viewed), 0, Configuration::get('PRODUCTS_VIEWED_NBR')) : array();
 
-		if (sizeof($productsViewed))
+		if (count($productsViewed))
 		{
 			$defaultCover = Language::getIsoById($params['cookie']->id_lang).'-default';
 
@@ -116,11 +116,11 @@ class BlockViewed extends Module
 			);
 
 			$productsImagesArray = array();
-			foreach ($productsImages AS $pi)
+			foreach ($productsImages as $pi)
 				$productsImagesArray[$pi['id_product']] = $pi;
 
 			$productsViewedObj = array();
-			foreach ($productsViewed AS $productViewed)
+			foreach ($productsViewed as $productViewed)
 			{
 				$obj = (object)'Product';
 				if (!isset($productsImagesArray[$productViewed]) || (!$obj->active = $productsImagesArray[$productViewed]['active']))
@@ -147,29 +147,20 @@ class BlockViewed extends Module
 				}
 			}
 
-			if ($id_product AND !in_array($id_product, $productsViewed))
+			if ($id_product && !in_array($id_product, $productsViewed))
 			{
 				// Check if the user to the right of access to this product
-				$result = Db::getInstance()->getRow('
-				SELECT COUNT(cug.`id_customer`) AS total
-				FROM `'._DB_PREFIX_.'product` p
-				LEFT JOIN `'._DB_PREFIX_.'category_product` cp ON (cp.`id_product` = p.`id_product`)
-				LEFT JOIN `'._DB_PREFIX_.'category_group` cg ON (cg.`id_category` = cp.`id_category`)
-				LEFT JOIN `'._DB_PREFIX_.'customer_group` cug ON (cug.`id_group` = cg.`id_group`)
-				WHERE p.`id_product` = '.(int)($id_product).'
-				'.($this->context->customer->id ? 'AND cug.`id_customer` = '.(int)$this->context->customer->id :
-				'AND cg.`id_group` = 1')
-				);
-				if ($result['total'])
+				$product = new Product((int)$id_product);
+				if ($product->checkAccess((int)$this->context->customer->id))
 					array_unshift($productsViewed, $id_product);
 			}
 			$viewed = '';
-			foreach ($productsViewed AS $id_product_viewed)
+			foreach ($productsViewed as $id_product_viewed)
 				$viewed .= (int)($id_product_viewed).',';
 			$params['cookie']->viewed = rtrim($viewed, ',');
 
-			if (!sizeof($productsViewedObj))
-				return ;
+			if (!count($productsViewedObj))
+				return;
 
 			$this->smarty->assign(array(
 				'productsViewedObj' => $productsViewedObj,
@@ -179,7 +170,7 @@ class BlockViewed extends Module
 		}
 		elseif ($id_product)
 			$params['cookie']->viewed = (int)($id_product);
-		return ;
+		return;
 	}
 
 	public function hookLeftColumn($params)