Hi, I've noticed that I keep having the same issue occuring on my home page with the 2nd row of portfolio items. It gives me a "broken image" icon all the time, even though the image is right there. Nothing I do seems to fix the issue. I've attached a screenshot as well to demonstrate, but you can also visit my site at 2012.shatterglassstudios.com.
You'll also notice a strange issue I'm getting at the bottom with the logo's as well.