Thanks so much for this thread posting. It save me a lot of anguish when I realized that my site was displaying incorrect prices in the "Also Purchased" section.

I will note that the file is generally located at
"{Root}/Includes/Modules/also_purchased_products.php"

Or if you are using a custom template, the template file must be replaced also.

Mine was at
"{Root}/Modules/{YourTemplate}/also_purchased_products.php"

Thanks again