I think it is a file size issue. In IE8, I see two thumbnails on the Photography page (Back Off and Defending His Harem); those are the ones that have "reasonable" file sizes (though 45k and 35k are still too big for images of those dimensions). The three images that are not displaying are 596k, 600k and 590k. This is far too big for any reasonable "large" image, never mind 166x120 px thumbnails.
Optimize your images and then see if you still have problems.
By the way, did you ever fix the validation issues mentioned above? If not, try to do that before asking again.



