Read more – inactive

Hi, a customer is currently evaluating different themes for her blog. She quite liked prefer-blog but found one problem. She prefer the setting “Show from Content” and plan to use the build in “Read more” in articles to control the how much is show on the front page.
As seen on the post called “Sommeraltanen” the read more tag is show as (mere…) – Danish for “More..” but although the link seem correct when hovering over the link, nothing happens when selecting it.

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