Trouble with button icon images

[Pete]

I have a card in a substack of my mainstack that contains images for
buttons I use in other substacks.  All seems to work fine so far but I have
a problem with one button whose image does not show up.  The same image is
used as the  icon for buttons on other cards and shows up just fine.  If I
copy a button that uses the image from another card to this card, the image
disappears from the button.  Other buttons on the same card that refer to
different images work just fine.

Any ideas?

-- 
Pete
Molly's Revenge <http://www.mollysrevenge.com>