diff --git a/app/code/core/Mage/Core/Controller/Varien/Action.php b/app/code/core/Mage/Core/Controller/Varien/Action.php
index efe4e775f06..7ebe3580c2a 100644
--- a/app/code/core/Mage/Core/Controller/Varien/Action.php
+++ b/app/code/core/Mage/Core/Controller/Varien/Action.php
@@ -790,8 +790,7 @@ protected function _getRefererUrl()
         if ($url = $this->getRequest()->getParam(self::PARAM_NAME_URL_ENCODED)) {
             $refererUrl = Mage::helper('core')->urlDecodeAndEscape($url);
         }
-
-        if (!$this->_isUrlInternal($refererUrl)) {
+        if (empty($refererUrl) || !$this->_isUrlInternal($refererUrl)) {
             $refererUrl = Mage::app()->getStore()->getBaseUrl();
         }
         return $refererUrl;
diff --git a/app/code/core/Mage/Core/Helper/Abstract.php b/app/code/core/Mage/Core/Helper/Abstract.php
index 012e580ab11..ffbd2503a61 100644
--- a/app/code/core/Mage/Core/Helper/Abstract.php
+++ b/app/code/core/Mage/Core/Helper/Abstract.php
@@ -343,6 +343,9 @@ public function jsQuoteEscape($data, $quote = '\'')
      */
     public function quoteEscape($data, $addSlashes = false)
     {
+        if (!$data) {
+            return $data;
+        }
         if ($addSlashes === true) {
             $data = addslashes($data);
         }
diff --git a/app/code/core/Mage/Sales/Model/Quote/Address.php b/app/code/core/Mage/Sales/Model/Quote/Address.php
index 7acfd689fc0..60bcfa76a41 100644
--- a/app/code/core/Mage/Sales/Model/Quote/Address.php
+++ b/app/code/core/Mage/Sales/Model/Quote/Address.php
@@ -427,6 +427,9 @@ public function setQuote(Mage_Sales_Model_Quote $quote)
      */
     public function getQuote()
     {
+        if (is_null($this->_quote)) {
+            $this->_quote = Mage::getModel('sales/quote')->load($this->getQuoteId());
+        }
         return $this->_quote;
     }
 
diff --git a/app/code/core/Mage/Sales/Model/Quote/Item.php b/app/code/core/Mage/Sales/Model/Quote/Item.php
index 0001e7c0332..08206170b31 100644
--- a/app/code/core/Mage/Sales/Model/Quote/Item.php
+++ b/app/code/core/Mage/Sales/Model/Quote/Item.php
@@ -272,6 +272,9 @@ public function setQuote(Mage_Sales_Model_Quote $quote)
      */
     public function getQuote()
     {
+        if (is_null($this->_quote)) {
+            $this->_quote = Mage::getModel('sales/quote')->load($this->getQuoteId());
+        }
         return $this->_quote;
     }