title: Rails 3.2, Heroku - can't display my page - error 500
body: <p>Whole day I am struggling with the deployment of my app to Heroku. Still getting there the error 500, specifically this is the output from log:</p>
  
  <pre><code>2012-03-09T16:56:25+00:00 app[web.1]: [DEPRECATION] Paperclip::Attachment.interpolations is deprecated and will be removed from future versions. Use Paperclip.interpolates instead
  2012-03-09T16:56:28+00:00 app[web.1]: &gt;&gt; Thin web server (v1.3.1 codename Triple Espresso)
  2012-03-09T16:56:28+00:00 app[web.1]: &gt;&gt; Maximum connections set to 1024
  2012-03-09T16:56:28+00:00 app[web.1]: &gt;&gt; Listening on 0.0.0.0:21464, CTRL+C to stop
  2012-03-09T16:56:29+00:00 heroku[web.1]: State changed from starting to up
  2012-03-09T16:56:31+00:00 app[web.1]: 
  2012-03-09T16:56:31+00:00 app[web.1]: 
  2012-03-09T16:56:31+00:00 app[web.1]: Started GET "/" for _my_ip_ at 2012-03-09 16:56:31 +0000
  2012-03-09T16:56:32+00:00 app[web.1]: cache: [GET /] miss
  2012-03-09T16:56:32+00:00 heroku[router]: GET url_app.herokuapp.com/ dyno=web.1 queue=0 wait=0ms service=870ms status=304 bytes=0
  2012-03-09T16:56:33+00:00 heroku[router]: GET url_app.herokuapp.com/favicon.ico dyno=web.1 queue=0 wait=0ms service=4ms status=200 bytes=0
  2012-03-09T16:56:33+00:00 app[web.1]: cache: [GET /favicon.ico] miss
  </code></pre>
  
  <p>What is there wrong? The log says nothing exactly, I am not sure where to search the problem... Locally works me the app well.</p>