The background of the picture which she draws had changed black. I doing, it became the same result. I think that it is bug.
Yes, it is a bug. Somehow a fix we did for the squeakland.org version did not make it into the developers squeak. You may actually want to explore the squeakland.org version for your niece to use.
Why Nishihara-san's patch does not merge into developer's version? It works fine.
According to Andreas Raab the fix is not fine. A better fix is in the squeakland image and was just posted to the sqf list (perhaps it should have been posted here, too). http://lists.squeakfoundation.org/pipermail/squeakfoundation/2003- March/001027.html
-- Bert