Just opens the image in a empty browser window… lightbox isn’t getting triggered at all. No idea why. The rel tag is “lightbox[gallery-1]” (generated by a native WordPress Gallery) and the gallery is set to link to “File”. I might try disabling all my other plugins to see if there’s a conflict or something because it doesn’t look like there are many other responsive alternative out there other than “FooBox” and “Lightbox Plus Colourbox” but the former has a weird navigation UX and captions still don’t work on the latter (a well know issue that’s still not fixed).
Anyway… sorry for the meaningless post. If I discover anything I’ll post an update.