Seems I just didn't look hard enough for the needle. Your template has the <hr> between each product, but it is set to white so that it is essentially invisible unless you cilck on just the right spot to inspect, or go through view source.
You can edit this line in your stylesheet.css
hr{ height: 1px; margin-top: 5px; border: none; border-bottom: 1px solid #ffffff; }
or if you don't want to change all <hr> from white, you can add a rule like
#newProductsDefault hr, #featuredDefault hr, #allProductsDefault hr {color: #aabbcc;}



