I am not sure why, but very large images do not seem to thumbnail/populate until you click the direct image URL.
link : http://vivithemage.com/zen/vivi/
gallery : 600T
you can see in the gallery, no images either, just the url/link :http://vivithemage.com/zen/vivi/600T/
image does indeed exist :http://vivithemage.com/zen/albums/vivi/600T/P1000014.JPG
Is there something I need to check to allow this large of images?