I have Cart Validation enabled. I'd like to use the Product Upsell script to add a donation form to my cart (http://wiki.foxycart.com/snippets/misc_cart_and_checkout/product_upselling
). I'm getting a "Cart Validation Error: code_present" message. It looks like I need to validate the "product".
Is that correct?
How can I do this via the cart template?