title: Facebook Like Button renders 1000px*1000px after pressing Back on Browser on Chrome and blocks page content
body: <p>I implemented html5 version of the like button on the header of my page.
  once i navigate to another page and press the back button on the browser the FB button renders the iframe the size of 1000px * 1000px and masks the page content.</p>
  
  <p>any solutions for this ? is this a known issue? </p>