They might have rejected it because the top row of thumbs, just beneath the recips, appear to be clickable thumbs, but they are not. There's rules against using banners and image that can mistaken for clickable thumbs which are not linked to the corresponding larger image.
"What is a misleading banner?
Misleading banners are very similar to misleading links (above), except the banner is designed to fool or "trick" the surfer into clicking on it. For example:
* Banners which are made to appear like one or more thumbnails."
http://www.richards-realm.com/thumbn...tReasons.phtml