In reply to Stevie989:
Hi Steve,
It's not as fault - the site shows an image the correct size for window it's displayed in instead of the full-size image that's been shrunk by the browser. This both saves on bandwidth costs for UKC and also makes the page load faster you.
If the image is bigger than ~850 pixels wide then clicking on the image will show the original image at full size (if the browser window is big enough to handle the full-size).
Cheers, Paul.