I'm unable to see these images via your site in any browser on Mac or PC. However, I can see them across both platforms when I link to them directly e.g. http://www.store.seventhjungle.com/i...t/escaperg.jpg.

The locations and links that you're using look fine, which makes this feel like a permissions issue to me. What type of server are you hosted on and what are the permissions on the images and images/product directories, and on the images themselves?