getting a segfault when trying to draw within a keypress event

[Martin DeMello]

Shoes.app :width => 800, :height => 630 do

  fill "#2F2"
  rect(0,0,200,200)

  keypress {|key|
    fill "#22F"
    rect(0,0,100,100)
  }

end

$ shoes testapp.rb # press a key
testapp.rb:8: [BUG] Segmentation fault
ruby 1.8.6 (2007-09-24) [i486-linux]

/usr/local/bin/shoes: line 7: 11630 Aborted
LD_LIBRARY_PATH=$APPPATH $APPPATH/shoes-bin $@