Gallery not working since a couple of hours

Hi

I tried searching but and i did find some posts about messed up galleries etc, but none of the sollutions work for me.

The galleries we have created earlier today on the site (www.spel2.se) works fine but any gallery we create now this evening works at all,

here are the same article in 2 different posts, one from earlier today and one from right now, i copied the HTML-text from the first to the second and the way the gallery looks in the second is ofc the faulty one,
http://www.spel2.se/2013/01/orangepixel-fortsatter-med-en-dungeon-crawler/

http://www.spel2.se/2011/12/test/

and dont get fooled by the date in the url for the second one, i set it back that far so it would not show up for ppl when they are browsing the site 🙂

Any idea what to do? we have not added or updated any plugins prior to this happening.