One of my blogs have crashed

I have a multisite installation with 430 sites, and now one of them have crashed without reason. It´s the listings (custom posts) that won´t open.

Check it out here: http://bit.ly/XZTqGf

Click one of the listings, and you´ll just get to a page with no content.

Do anyone have any idea how I can fix this?

/Jens