This test checks that shifting an abspos container will properly repaint its descendants.
The images below should be correctly repainted.
  
(repaint rects
  (rect 0 0 1500 237)
  (rect -250 0 1500 237)
  (rect 0 0 700 237)
  (rect -250 0 700 237)
  (rect 704 0 700 237)
  (rect 454 0 700 237)
)