I had no idea what this was supposed to be, and I thought maybe it just wasn't loading more content, so I checked the source. While there, Firefox told me there was an error with the HTML, and that the <section> element contained elements that hadn't been properly closed.
This turned out to be because of the first <div> element in the section, because it's trying to be a self-closing element when such a thing isn't possible.
As it turns out, the slashes you see in such elements as <br /> are purely decoration in HTML5. They're a holdover for people like me, who like the structure that XHTML tried to bring to the language. <br> is the proper HTML5 element, and <br /> is just there for decoration/compatibility. The slash doesn't mark the element as void - the element is void regardless of whether or not you use the slash.
The impact of this is that trying to create a self-closing <div> in HTML5 by including the slash in the start tag - i.e. <div /> - only opens a <div> without closing it. You need to include a closing tag right after the opening tag to get the result you want - i.e. <div></div>.