When rendering my scene as an animation, on particular frames (in this instance, 17), I often get a delay in the outlining, like it's trying to outline the next/previous frame.  
  
This doesn't happen when rendering the frame normally - as in not an animation.

It looks like this:  
[When animated][1]  
[When rendered normally][2]


  [1]: http://i.imgur.com/2tXax22.png
  [2]: http://i.imgur.com/9FVHo8C.png
It's like the actual render is delayed by a frame, but only when animated.  
Is this a known bug?