title: "\xFF" from ASCII-8BIT to UTF-8 using paperclip
body: <p>I got a problem using paperclip gem in rails.
  I was following this tutorial <a href="https://devcenter.heroku.com/articles/paperclip-s3" rel="noreferrer">https://devcenter.heroku.com/articles/paperclip-s3</a></p>
  
  <p>I got this param in my avatar <code>ActionDispatch::Http::UploadedFile:0x007f5f2bdafde0</code>
  that give me this error when i'm using json:</p>
  
  <pre><code>"\xFF" from ASCII-8BIT to UTF-8
  </code></pre>
  
  <p>So anyone know what i have to do with this param ? I tried to force encode it but it's not working any ideas?</p>
  
  <p>I am using s3 amazon service for upload my avatar. </p>