title: Build status picture stays at "build unknown"
body: <p>Even if the builds are passing on Travis, the Build Status picture seems to have stopped changing. It still says "build unknown".</p>
  
  <p><img src="https://i.stack.imgur.com/Lwuyl.png" alt="build unknown"></p>
  
  <p>My <code>.travis.yml</code> contains:</p>
  
  <pre><code>language: node_js
  node_js:
    - "0.12"
    - "0.11"
    - "0.10"
    - "iojs-v2.1.0"
    - "iojs-v1.0.4"
  services:
    - mongodb
  </code></pre>
  
  <p>What's the problem?</p>