Hello Squeakers!

I am really puzzled about this: I have 2 PNGs, both with transparent
pixels. Although both are rendered accordingly when I ask for the
"stencil" (map of transparent vs. opaque pixels) one of them gives me
the correct image, whereas for the other I just get a black box.

Using the files attached, "triangle-sketch" gives me the correct mask
and "home-gimp..." gives me the black box.

I evaluate this in a workspace, first by d&d the files into Squeak
(4.3, all-in-one, Mac), and then d&d into the workspace:

(SketchMorph withForm: sketch305 form stencil) openInHand.
(SketchMorph withForm: sketch1737 form stencil) openInHand.

I show the situation in the attached screenshot.

Any idea why this is so? Thanks in advance!

Sebastian
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