Has Facebook changed the "Dark" Color scheme for the Like Box?

I've had my "Like Box" color scheme set to "Dark" for months and all of a sudden it only displays in "Light" (used to be background black and text white). I went to the developer pag开发者_开发知识库e and it appears the Dark setting is not working the same for the demo either when settings are made for template. Has something changed with the plug-in? Did they change the "Dark" scheme to some kind of transparent background?

i tried facebook developer page and i can get code for dark theme too

see here code is something like

<div id="fb-root"></div>
   <script>(function(d, s, id) {
  var js, fjs = d.getElementsByTagName(s)[0];
  if (d.getElementById(id)) {return;}
  js = d.createElement(s); js.id = id;
  js.src = "//connect.facebook.net/en_US/all.js#xfbml=1";
  fjs.parentNode.insertBefore(js, fjs);
 }(document, 'script', 'facebook-jssdk'));</script>

 <div class="fb-like" data-href="http://www.example.com" data-send="true" data-width="450" data-show-faces="true" data-colorscheme="dark"></div>