When I look at your site in Firefox and r-click to view the image I get this :

The image “http://www.davidbaroni.com/store/ima...ssion_MED.jpg” cannot be displayed, because it contains errors.

That's the new product image you are referring to?

I can't see any indication at all of an image missing on your main page, but maybe the problem with that image is an incomplete upload ?

Hope that helps a little.