title: Drupal's JS and CSS optimization error
body: <p>I started getting errors after I turned on Drupal's performance improvements which pack all the CSS and JS files into single files. The error looks like this:</p>
  
  <blockquote>
    <p>The selected file /tmp/fileO4fjBF
    could not be uploaded, because the
    destination
    js/js_8a69e612be02242c2866a4a19223bd12.js
    is not properly configured.</p>
  </blockquote>
  
  <p>I'm not sure how I should configure my server for this to work correctly. There is nothing in the documentation about this. </p>