Works in Chrome but not Firefox or IE

So I built this site some time ago, and am using a theme called “Humble”. The client loved the little polaroid slider. The issue is that the slider doesn’t show up in Firefox or IE. Look at it in Chrome to see how this is supposed to look.
Why is nothing displayed in Firefox or IE? This is making me crazy.

Hm, if I were you, I’d create a duplicate of that page and slowly strip out all the other JavaScript to determine if anything is conflicting with the script. The original works in Firefox, so something subtle has been lost in translation.