Anyone got a solution on this yet? I'm also having the same problem with my site and I really hope someone would be kind enough to help. I'm very grateful to the creators of nopcart but I would like to have some advice when needed.
I tried with the checkout.pl but I got only Internal Server Error. On the other hand, checkout.php works fine except for the emails and CSV file which are lacking the product info. The variables are passing trough according to formprocessor.php.