I had fast and easy checkout installed for me by Numinix on my main website (zen cart version 1.3.9h) and noticed that the "continue shopping" button on the shopping cart page didnt work anymore, when clicked - it basically reverts to "page not found".

Ive got more confident about doing my own installs and have just today installed fast and easy checkout on another 1.3.9h site and have the same problem with the "continue shopping". No other problems, just this.

Its already cause a problem with a customer.