Traceback (most recent call last):
  File "/usr/share/sugar/activities/TurtleBlocks.activity/TurtleArt/tawindow.py", line 2972, in __run_stack
    self.canvas.setup_svg_surface()
  File "/usr/share/sugar/activities/TurtleBlocks.activity/TurtleArt/tacanvas.py", line 127, in setup_svg_surface
    self.width, self.height)
IOError: error while writing to output stream