If you're using the WordPress shopping cart plugin WP Ecommerce and have version 3.6.9 or 3.6.10 RC1 or 3.6.10 RC2 and are using Google Checkout for your payment gateway, you may have noticed a problem. On the checkout page, there is a normal "Make Purchase" button like on all other payment
Variations & Google Checkout
So, if any of you use the Wordpress shopping cart plugin WP Ecommerce, first of all you'll notice that it is a superb ecommerce solution for a Wordpress site. With that being said, there are some bugs here and there, which is to be expected I think...after all the plugin is free! So, what I would