title: Facebook like count resets after a 301 redirection
body: <p>I have an article on my site that has published in a wrong category. I wanted to change the category, and since the category name is part of the url, I than added a 301 redirection to the updated url.
  That article had also several likes, but after the 301, it was reset to 0 likes, since to Facebook this is now as a new url with no likes. 
  If I remove the 301 than the likes count is updated again.
  Is there a way to notify FB that a certain url is a result of a 301 that has likes count?
  I assume it is relevant as well for pages with FB comments</p>