title: Bootstrap JS works, but not tooltip
body: <p>I've confirmed that my bootstrap.js works by invoking a dropdown, and also a modal popup. Both of them work, but when I try to get tooltip to work it fails. As far as I understand from the documentation <a href="http://twitter.github.io/bootstrap/javascript.html#tooltips" rel="nofollow">here</a> you merely have to put this:</p>
  
  <pre><code>&lt;a href="#" data-toggle="tooltip" title="" data-original-title="Default tooltip"&gt;you probably&lt;/a&gt;
  </code></pre>
  
  <p>However, no tooltip appears at all. Yet, the dropdown that I invoke with the same API as below works:</p>
  
  <pre><code>&lt;div class="dropdown"&gt;
      &lt;a class="dropdown-toggle" id="dLabel" role="button" data-toggle="dropdown" data-target="#" href="/page.html"&gt;
          Dropdown
          &lt;b class="caret"&gt;&lt;/b&gt;
      &lt;/a&gt;
      &lt;ul class="dropdown-menu" role="menu" aria-labelledby="dLabel"&gt;
          ...
      &lt;/ul&gt;
  &lt;/div&gt;
  </code></pre>