open Tripod/images/thumb-transparent-img.png in PhotoShop, or any tool that can cut images, and crop it in half. Save. Check your thumbnails - it should look distorted http://i.imgur.com/MGH72Q2.jpg , but in rectangles. To fix image distorsion, open Image Sizes settings and cut the height, for thumbnails, in HALF http://i.imgur.com/5yHBHuq.png . The result should be this one http://i.imgur.com/kD6JBt1.jpg . A lot better, huh? Cheers!