title: Static assets not refreshing with symfony2 clear cache command
body: <p>I'm using Assetic with the compass filter to pass and compile .scss files. This part of the setup seems to work fine. However, my understanding was that in the app_dev environment, Symfony 2 would recompile all assets (including css) for each page load and not use the caching system that it employs for prod environment. </p>
  
  <p>This seems not to be happening.</p>
  
  <p>When I make a change to a .scss file it will only take effect if I use:</p>
  
  <pre><code> app/console cache:clear
  </code></pre>
  
  <p>I thought the whole point of the dev environment was to avoid having to do this each time?!</p>
  
  <p>I've checked the permissions of the cache folders (to be safe I've set them so anybody can read and write). Does anybody have any suggestions?</p>