title: Thumbnail 404 error
body: <p>I'm trying to get the thumbnail of a file but am getting an error 404, the url that return drive is like this in some  files</p>
  
  <p><a href="https://docs.google.com/feeds/vt?gd=true&amp;id=1DnoJzxnZXVERyqC5jfTwfpd8uEn&amp;v=39&amp;s=AMedNnoAAAAAUL0gv5da9U81UzT-L4N59b1BwNuZmzgU&amp;sz=s220" rel="noreferrer">https://docs.google.com/feeds/vt?gd=true&amp;id=1DnoJzxnZXVERyqC5jfTwfpd8uEn&amp;v=39&amp;s=AMedNnoAAAAAUL0gv5da9U81UzT-L4N59b1BwNuZmzgU&amp;sz=s220</a></p>
  
  <p>but in others is </p>
  
  <p><a href="https://lh6.googleusercontent.com/ACwqFdvBX0NUJO6SR9fyemnCnSel-TpCZTaddu9CEkZqxtQpJY84cP_cFj64CA6=s220" rel="noreferrer">https://lh6.googleusercontent.com/ACwqFdvBX0NUJO6SR9fyemnCnSel-TpCZTaddu9CEkZqxtQpJY84cP_cFj64CA6=s220</a></p>
  
  <p>the last  one is from picasa and works, so apparently the url's that works are from picasa, how can i get the url's of all files like the last one? </p>