Running the WooCommerce plugins and for one product, we have 3 reviews added. You see them in the Dashboard but when you go to the product page, you see "Reviews (3)" but no content shows up. The site is running Headway theme.
Here is the page I'm talking about: http://paulettereesdenis.com/product/tribal-vison-a-celebration-of-life-through-tribal-belly-dance/
Also on products with no reviews, there is no option to leave a review.