When I try to make an entry for 'hackerne.ws' (using same selector as news.ycombinator) it saves but then resets the regex after I visit the site and it doesn't

When I try to make an entry for 'hackerne.ws' (using same selector as news.ycombinator) it saves but then resets the regex after I visit the site and it doesn't work. Any ideas? Otherwise, I'm a fan - will keep using.