Image going down

Hi there,
when i clik on the image, the viewer seems to go down in the page. The more i clik to see more images, the more its goes down the page.. help!!!
Check on my site
http://aminumerique.com/?page_id=212

Firefox 20.0
Mac OS 10.7.5

Thanks

http://ww.wp.xz.cn/extend/plugins/awesome-flickr-gallery-plugin/