When you right-click on the small image for facebook, you should be able to select "Inspect Element with Firebug."
You will see that firebug highlights the facebook image. Two lines up is the div that controls the image and its title. <li class="hfacebook">
If you search using the Developers Tool Kit for hfacebook, it should show you the file that utilizes that call.
While you are at it, go to
http://tinyurl.com/o6oe75w and click on Add to Cart. This should be fixed ASAP. The Please Select Options (and any option that is not really part of the item) should be set to Display Only. Otherwise, you have to call the customer to find out what they really wanted.