This is a new one on me!
There's something inherently unstable about the way this site is working with WooCommerce. The people that originally installed it won't even support the site any more. (I have an account and have purchased, so I can post about it here).
Now, when I go to the store page:
the products repeat infinitely in all browsers. Check it out, you'll see what I mean. There should be a few products, but the page never concludes loading because it's repeating the same few products over and over and over.
It didn't do this until the 3.5 / 1.6.6 upgrades. Before, it would just break all the time! : (