Brief
We have updated the file 'shopping_cart.php' for version 3.6.
 
Description
When an administrator deleted a product not all information was deleted for this id (i.e, quantity pricing).
 
Solution
We would recommend you to download an updated version of the file from here:
http://www.viart.com/downloads/shopping_cart-3.6.zip
 
Further, extract the above mentioned file into the 'includes' folder (in the BINARY mode) of your shop. Do not forget to make a backup copy of the current file in case something goes wrong.