title: Div not expanding to 100% (default behaviour)
body: <p>I have a strange problem....</p>
  
  <p>Div should expand to 100% of available space by default, but its not the case.</p>
  
  <p>I don't understand what's going on, even if I put display:block it's behaving as automatic width (relative to content).</p>
  
  <p>I appreciate any help.</p>
  
  <p>Thanks in advance.</p>
  
  <p><a href="http://jsfiddle.net/T3arP/" rel="nofollow">http://jsfiddle.net/T3arP/</a></p>
  
  <p>The effect I need to achieve is let the box with green border absoluted or fixed to top of its container, so you can scroll keywords but title will remain there.</p>