title: Asset sync uploading (almost) all assets to S3 on every deploy, even though nothing has changed
body: <p>Some assets  are kept, but a lot of assets are uploaded every time (amonst others the tiny_mce files, but also static image files) even though I have changed nothing.</p>
  
  <p>I am using Heroku on cedar stack, and v.0.5.4 of the asset sync gem.</p>
  
  <p>Part of the log from Heroku push:</p>
  
  <pre><code>Uploading: assets/logo_na.png
  Uploading: assets/icons/woofunction-icons/home_32.png
  </code></pre>
  
  <p>(Which have not been changed)</p>
  
  <pre><code>Ignoring: assets/application-2b6fe7367c39811f8bae3c83bd39e8bf.js.gz
  Ignoring: assets/application-44fd5226ff0852aeecfcda68b9aa755c.css.gz
  </code></pre>
  
  <p>(These have not been changed either, but are properly ignored.)</p>
  
  <p>This used to work just fine, the problem appeared after i moved the apps to the heroku europe stack.  I have also added the turbo-sprockets-rails3 (0.3.6) gem without any apparent difference in what is uploaded.</p>