title: Attribute float makes parent element ignore its height
body: <p>I think seeing the effect live is better than posting code here. So you can find it here: <a href="http://jsfiddle.net/9GGTr/4/" rel="nofollow">jsfiddle</a></p>
  
  <p>As you see, the Add button is on the border. If there was no float set for the button, everything would be perfect. As soon as I set float (be it left or right), the box doesn't expand as much as it should.  </p>
  
  <p>Any idea how to solve this? Thank you.</p>