[pygame] help: problem with pygame.display.get_surface

[inhahe]

I'm having a problem here.  I want to get a new surface when I resize
a window so that I have access to the entire window, if it's bigger.
So I figured screen = pygame.display.get_surface() is the way.  But
it's not working.  it's giving me a surface with the same dimensions
as the display before it's resized.  Here's some minimal code that
shows the problem:

import pygame
screen = pygame.display.set_mode((800,600), pygame.RESIZABLE)
while 1:
    event = pygame.event.wait()
    if event.type == pygame.VIDEORESIZE:
      print event
      print pygame.display.get_surface()


the printout of event shows the new dimensions of the display, and
pygame.display.get_surface() is returning a surface with the old
dimensions.

OS: Windows XP SP2
Python: 2.5.1
pygame: 1.7.1release


Is this a bug, or am I doing it wrong, and is there any other way to do this?