Many of your out there might be running a multi-site network and have a light box or other gallery plugin that is network activated.
Upfront / Panino contains a lightbox and built in gallery plugin with the theme.
A problem that occurs is that the lightbox for images loads twice, so I needed to create a plugin that disables the lightbox script for my gallery plugin when the upfront theme is loaded and when NOT on a post type of the my gallery plugin. The gallery plugin i have network activated is Fancy Gallery, and this is the plugin I wrote to solve the problem:
This is free to use, enjoy.