title: TableView Seperator line gets added to the section header view, what to do?
body: <p>I got a table view with two sections, no crazy code, just my delegate methods.
  It works pretty fine, like i want it to work. It should just look like on this screenshot:</p>
  
  <p><img src="https://i.stack.imgur.com/Tpw7O.png" alt="enter image description here"></p>
  
  <p>Now the problem is: Sometimes while scrolling or flicking the scoll view to the bounds, this happens (if you can't see it: There is 1 or 1/2 pixel in gray on the top of the second section header, what is not intended to be so):</p>
  
  <p><img src="https://i.stack.imgur.com/OGjAo.png" alt="enter image description here"></p>
  
  <p>So, is this a iOS 7.1 or 7.x bug? I'm not using a custom view for the header. Does anyone know how to fix this?</p>
  
  <p>Feedback really is appreciated.</p>