Re: cursor doesn't show through transparent images in emacs 22, unlike emacs 21

[Richard Stallman]

    when i tried it, the cursor wouldn't show unless i included a ":mask
    'heuristic" property.  by default, i was referring to the type of
    heuristic used when you specify 'heuristic without a specific type.

I still am not sure I understand you.  Are you saying that when you
specify `heuristic' for :mask, then the default is to choose one of
the four corners?

What happens when you do not specify any :mask attribute?
Is that the case where the cursor fails to show?

If so, then I understand; but until you confirm, I am not sure I
understand.

If I understand right, then this is a bug, as I previously said.

    i believe kim suggested something like showing a margin with the
    cursor color around such images when there is no such border, which i
    expect is a good for that remaining case.

That would be bad,  since it would change the geometry.
What I think he proposed is to show the cursor over the outer parts
of the image.  That seems good for this case.