Images not clicking

I am using visual portfolio for a client.
For some reason (nothing has been changed) the images are not clickable anymore.
Expected behaviour:
Visitor clicks images, goes to detail page
Current behaviour:
Visitor clicks image, nothing happens.

If I change everything to gallery, the clicks work, the current settings are to click to a URL (actual portfolio entry) but the images do not click. Not in Chrome, not Opera.

What is going on?

The page I need help with: [log in to see the link]