I've also left a message for the lightbox dev, but no response yet. I'm got both wp-supersized and "Light – A Free Responsive Lightbox Plugin for WordPress" running here: http://www.maplehurstweddings.com/photographs/the-farm/. When a thumbnail is clicked the lightbox jumps up to the left before landing in the center. I turned off wp-supersized and the problem was fixed. Do you know of a solution for this? Maybe it's a jquery conflict? Thanks!