gdk_pixbuf problems displaying some images

[Scott Gifford <sgifford suspectclass com>]

I can't get a gdk_pixmap to display some PNG images, such as the one
at:

    http://www.suspectclass.com/~sgifford/imagemagick/example-out.png

Instead, it displays an image of grey and white stripes.  Mozilla and
ImageMagick can display this image fine.  It was created by
ImageMagick, but I've had the same problem with some PNGs created by
GhostScript.

file(1) describes the image as:

     PNG image data, 618 x 814, 8-bit grayscale, non-interlaced

I'm testing with my own application which uses gdk_pixbuf, and also
with Electric Eyes (ee).

Anybody got any ideas?  Is there a better place to ask this question?

Thanks,

----ScottG.