It seems to be something with AJAX calls being made back to the server. The modules in the top load the image directly. The ones in the middle seem to load 'blank.gif' for all images and then tries to refresh them with the correct image after the page loads. Something is preventing that from occuring.
Facebook is picky about what content loads and how, to prevent abuse. I'm not sure if jReviews needs to load it's images immediately, or if there's even an option for that. Unfortunately though, I'm not sure what the solution to the problem would be.
Hope that helps get you started in the investigation,
Alex
Some images don't appear in facebook app
