I am having a problem with the images on product pages cutting off the Add to Cart Button. You can see from this page: http://www.icatcha.net/shop/orb-earrings/ that when I add an image that fills the column (620 pixels wide), it makes the Add to Cart button disappear.
You need to remove the float: left from that image so that the content below it doesn’t get hidden. Just hover over the image in the visual editor and them click on the image icon to open the pop up. Next, Where it has the align options, select the non option instead of left.