Randomly working / not working

Lightbox 2 works OK on some of my pages, like here: http://blog.christianehoej.dk/2013/05/tyrkiet/lang/en/
But on other pages, it just doesnt work – like here: http://blog.christianehoej.dk/2013/05/k-5-ii-forste-indtryk/lang/en/

Seems random to me, where it works and where it doesnt. Can’t see any difference in the HTML.

Have tried to disable all other plugins and shift to default theme, but that didn’t solve anything

Running WP 3.0.1 with Suffusion 3.6.6.

Thanks in advance for any help 🙂

http://wordpress.org/extend/plugins/wp-lightbox-2/