I actually have the problem on a site, that the lightbox is not working any longer, since i updated to WP 3.6.
Also the links to the bigger pictures do not working and so i had to deactivate the plugin, that users can see the bigger picture.
I have also installed a few other lightbox-plugins, but they wont work also.
So i think it's a problem that came with the update to wordpress 3.6.
Am i the only one with this problem?
Oh...forgot... Link to the site is: http://ford-truck-freaks.ch/site