title: image_tag points to assets/ in Rails 3
body: <p>I'm migrating Rails app from 2 to 3.</p>
  
  <p>Somehow from,</p>
  
  <pre><code>link_to image_tag("icon.png")
  </code></pre>
  
  <p><strong>img</strong>'s <strong>src</strong> attribute is prefixed with "/<strong>assets</strong>/icon.png" instead of "/<strong>images</strong>/icon.png" as it was in Rails 2.</p>
  
  <p>What is the correct way? Thanks</p>