- Fallback if javascript's disabled is to show no images
- Seconding Ian's note about the thumbnails jumping around depending on big image height (sometimes off the screen)
- Mouse wheel scrolls page up and down (standard design) until it's over an image, then behaviour changes. Unsure of that.
- Swipe motions for flicking between images? Good for viewing on a mobile device, but I'd imagine the skins are mostly for a desktop program. As mentioned above, next/prev overlay arrows would fit desktop design better
At least the JS for showing the pictures seems somewhat lean. I am (unfortunately) kinda already used to seeing pages "upgrade" using couple megs of minified JS which does everything including mowing the lawn to just show an image