I'm part way through a new site and have a strange thing happening. When I click the add to cart button the site generates a blank page, looking at the page source shows nothing there as well. Clicking the back button on the browser takes me back to the product page which has the green product added bar on top and when I go to the cart the product has been added.
I am following the standard override system for the template. I find if I change back to classic green the site works ok. I have obviously done something. My first check was restoring the tpl_product_info_display.php but this didn't help.
Can anyone give me a clue to what file I may have corrupted.
The site is http://evisualbridalboutique.com/store
Thanks in advance