Code Fragments Appearing in Gallery

Any idea why fragments of code would show up when I refresh the browser? This happens randomly every few times, and then most of the time the page loads as it should. View screenshot:

Also, is there any way to speed up colorbox? It’s taking a really, REALLY long time to load for the first image, and then it handles the rest fine. Strange.

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