I'm using the latest version of WordPress 3.4.2 and Woocommerce 18.104.22.168
At the checkout page I get the choose your delivery date box that spans the whole width of the page, but when you click in the box nothing happens. I've tried this in IE9, Firefox and Chrome all do the same thing.
Here's a link to the site http://www.starburst.burystedmundsprinting.com/shop/
Any help is greatly appreciated.