FYI try reproduce the issue in a variety of IE versions (incase you haven't already). IE tends to not work well with the interwebs on many occassions.

EDIT:: Well. Nevermind that idea. I decided i'd try as well. I went to the site and pressed "all categories" on the left hand side, it then brought up a blank page. I tried with IE + Firefox + Chrome, all browsers experience the same issue. FYI i'm australian.