title: JQuery drag/scrolling/overflow issue
body: <p>I have a scrolling:auto problem with JQuery 1.4.2 and JQuery 1.7.2.  I have a container DIV with 2 DIVs inside it.  Like this:</p>
  
  <pre><code>&lt;div id="dragContain"&gt;
  
  &lt;div id="dragMe"&gt;
    &lt;div&gt;Title goes here!&lt;/div&gt;
    &lt;div style="scrolling:auto;"&gt;Content goes here!&lt;/div&gt;
  &lt;/div&gt;
  
  &lt;/div&gt;
  </code></pre>
  
  <p>And I enable dragging the group by:</p>
  
  <pre><code>$('#dragMe').draggable({
    containment: '#dragContain', cursor: 'move', zIndex: 20000
  });
  </code></pre>
  
  <p>And, when I do so, in FF the scrolling only works with the mouse wheel.  Grabbing the scrollbar causes a drag event and moves the group.  It works fine in IE.</p>
  
  <p>Is there any way to correct this?  Can I make only the titlebar a grab handle which causes a drag on the parent div?</p>
  
  <p>Thanks!</p>