Updated the destroy function to only remove the cart session and not kill the general session data
diff --git a/system/libraries/Cart.php b/system/libraries/Cart.php
index a0b782b..61223c5 100644
--- a/system/libraries/Cart.php
+++ b/system/libraries/Cart.php
@@ -517,7 +517,7 @@
 		$this->_cart_contents['cart_total'] = 0;		
 		$this->_cart_contents['total_items'] = 0;		
 
-		$this->CI->session->sess_destroy();		
+		$this->CI->session->unset_userdata('cart_contents');
 	}