I appreciate that you're providing thumbnails, but could I offer a couple suggestions?
The thumbnails should be a direct link to the full-size image, like this:
^ It's pretty easy. Just copy the thumbnail location, and removed th_
from the url.
Prince%20Caspian/th_44a0cfda.png <-- The thumbnail URL
Prince%20Caspian/44a0cfda.png <-- The direct image URL
Also, post the thumbnails above
the full-size shots (for the same reason you let someone with 5 items cut in front of you when you have a full cart of groceries)