title: Facebook Thumbnail picture when link is shared will not update
body: <p>I recently changed the logo of my website along with the title of the site. For the logo, I kept the same file name, logo.jpg, just deleted the old picture and replaced it with the new picture. For some reason, when a link is shared via Facebook, the old logo still shows up as the thumbnail picture. </p>
  
  <p>For the title, It appears to work when a link is shared, but when two people share the same link and Facebook recognizes it and states, "Friend 1 and Friend 2 have both shared the link <strong><em>_</em>__</strong>." the old title appears.</p>
  
  <p>I changed the meta tag:</p>
  
  <p>meta property="og:title" content="Title ABC" </p>
  
  <p>yet it still has not updated. Do Facebook updates take a little time to process, does Facebook cache the image or am I doing something wrong?</p>