title: Input loses placeholder and some styles after .slideToggle()
body: <p>When I call the <code>.slideToggle()</code> method of jQuery 1.7.2, the input element lose its placeholder and its position is broken. It's gone to the top of the screen.</p>
  
  <p>The CSS:</p>
  
  <pre><code>$("#go").click(function(){
      $("#second").slideToggle("slow");
  });
  </code></pre>
  
  <p>The HTML:</p>
  
  <pre><code>&lt;input type="text" id="first" placeholder="first" /&gt;
  &lt;input type="text" id="second" placeholder="second" style="display: none;" /&gt;
  &lt;button id="go"&gt;Go&lt;/button&gt;
  </code></pre>
  
  <p>When I try to inspect this element in Google Chrome the placeholder goes back and styles are normalized.</p>
  
  <p>Why does this happen?</p>