GDlib puts bug on tux in my win2k

hi, all.
I am using GD 2.0.34 with mingw in my win2k. I compiled the src to get
DLL and lib file.
I met a problem while running the second example (gd-eg2.c) on
http://linuxgazette.net/issue91/shuveb.html. The result is expected to
be a resized tux as you can see. But what I get is a tux in
white-black with only one foot is
red(http://pyguiviactypes.googlepages.com/bug_tuxout.png). That is so
strange.
Is this a bug in GD or the example source? And how to fix it? Thanx