Site only showing fine in Chrome :S

My site used to work fine in all browsers but recently iv been messing with the CSS a bit, tweaking some things. Now for some reason its only working in chrome, not firefox or IE.

Website is : http://wow.deewon.com

Anyone got any tips to what could be causing it?

I think you removed your clear class from your stile sheet.

Try adding

.clear {
clear: both;
}