On the product listing pages I sometimes get an error when i click add to cart. I have a category full of normal products with a price. If no products are chosen and i click add to cart then I'm sent to a empty shopping cart, which is fine and dandy.

I ahve another category full of call for price products and if I click on 'add to cart' there I get this error message:


Warning: Variable passed to each() is not an array or object in /home/cotswoo/public_html/catalog/includes/application_top.php on line 725

Warning: Cannot modify header information - headers already sent by (output started at /home/cotswoo/public_html/catalog/includes/application_top.php:725) in /home/cotswoo/public_html/catalog/includes/functions/functions_general.php on line 53

Any thoughts? Thanks in advance.