The Verge reloads when going back


I don't know if this a feature of safari or if it was implemented by the site designers, but whenever I go backwards or forwards on the (using the two finger swipe in safari on lion, or the back/forward buttons), the page will reload. It makes browsing the forums a lot slower.

Does anyone know what causes this, and if there's a solution for it? For reference, I'm using a 2011 MacBook Air, 4GB RAM, and safari developer preview 5.2 It also reloaded when I was using 5.1.