Description
Some search engines consider product print page as duplicate content of the main product page. That's why special code was added in the script to avoid this situation (note: this code is already available in article print page).
 
Solution
http://www.viart.com/downloads/5.product_print.php.zip
 
Download the file above and extract 'product_print.php' in the root folder replacing existing file. Please do not forget to make a backup copy of the current file in case something goes wrong.