You have a plugin forcing latest jQuery 1.9 from Google CDN.
Not wise as it does it in a stupid way, caching is hosed with "/1/", but with jQuery 1.9 it has become critical as a migrate.js script is required to fix incompatible scripts. You do not load that so this can cause issues. The plugin forcing jQuery load has no clue of jQuery 1.9 and the almost required migrate.js file. Dev. thought he/she was smart using "/1/" as then latest version would always load. Nope not smart! Tons of scripts are not 1.9 compatible. Is only a little trick for devs., should not be in released plugin.
Load both if on 1.9 and then check error console which will tell you when jquery-migrate-1.0.0.js is working = saving you from broken scripts.
If relevant for this popping up issue I dont know but very likely will be for what ever else you run. I dont know how bleeding edge Lightbox dev. is but you probably should do testing on the version coming with WordPress 3.5 - that would be 1.8.3
Works fine for me on jQuery 1.9 but JS can act up in mysterious ways. You definitely will want migrate.js script if not very much on top of jQuery issues.