The portfolio on my site http://www.unitech-engineering.co.uk/projects is display a strange bug: The thumbnail images is supposed to be a scaled down version of the post image. However, when the page loads it shows a full-size corner of the image. This remains until the mouse hover over event and then the scaled down image appears. Happens for all posts. Any suggestions where this error may be coming from would be greatly appreciated. We have contact the theme author but they insist the problem is with the wordpress install and not their theme.