Hi John,
We have looked into your site on our development servers and there hasn't been an issue loading the images. On looking back at your original site we can see that you are getting resource loading error messages (see attached screenshot). This means that your hosting company is limiting how much resources your account is allowed to use before it gets cut off.
This currently mainly happens on your root "images" folder as there is a large number of images attempting to load at once there.
We will be working on a new parameter option to allow users to change how these thumbnails are loaded which should fix the issue for you. However, you may also want to check whether your hosting package is meeting all your needs as well because this issue may re-occur somewhere else on your site.
We will attempt to directly apply the fix to your site in the meantime and will let you know when we have completed the fix.
Thanks,
Paul