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

[Ken Manheimer]

i don't know how to get anything but the outermost pixels of the
cursor to show behind transparent images in emacs 22, while the cursor
body shows through the transparent part of images in emacs 21.

here's a fairly simple way to produce the effect:

 emacs -q

include the following text in the scratch buffer:

 (put-text-property 1 2 'display (find-image '((:type xpm :file "info.xpm"))))

evaluate the expression, and the first character in the buffer should
turn into the info question mark glyph.

put the cursor on the first character.  in emacs 22, only the
outermost pixel of the cursor shows.  in emacs 21, the cursor color
shows through everything but the question mark symbol, itself.

the info xpm images shipped with emacs 21.4 and 22.0.50 are identical.

is this a bug, or am i doing something wrong?

--
ken
address@hidden
http://myriadicity.net