Great plugin, though I am not sure if I have implemented correctly on my site.
Example page is: http://www.wildroad.com.au/photography/kimberley-storm-season/
The first 4-5 images seem to load correctly when scrolling the viewport down. However I've noticed when you get further down, images don't load when the viewport goes over them, and you have to scroll past them instead. It seems to get worse the longer the page.
Appreciate your thoughts.