Infinite Page Load After Initial Load

Hello,

On this site SadUseless, the page loads fine initially, then after 30 seconds or so, the page sends a request out (I cannot seem to find that request) and it ends up in an infinite loop, never loading the content that it is suppose to load.

I have tried inspecting the requests in Firebug, however it does not seem to show that last request that makes the page stuck in an infinite loop.

Any idea on how I can debug this issue ?

Thanks.