It seems like there are two codes for greyscale images on top of the portfolio image, and one of them is broken. The image code that shows a greyscale img hovering above the item image is:
<img src="http://tuxradio.com/wp-content/uploads/wwac_portfolio_cover.jpg" title="wwac_portfolio_cover" alt="" data-imgw="241" data-imgh="179" style="left: 0px; -webkit-perspective: 1000;">
The code that seems to be broken, and the resulting output looks like this:














