Probably because the transparent PNG support in IE7 is so weak, using
a "fadeTo" effect on content that includes a PNG image with
transparency leaves you with something that looks awful, even with the
"fadeIn" opacity set to 1.0 (which, one might think, would leave you
with no filtering at all). I can work around the problem by doing
something like this:
$(whatever).fadeTo(5, 1, function() {
$(whatever).css('filter', 'none');
});
but it'd be nice if jQuery itself would treat fadeTo(_, 1, _) as
setting "filter" to "none".
The effect of having the old filter hack there, even with opacity set
to 1, is to defeat the rendering of the PNG opacity.
--
Turtle, turtle, on the ground,
Pink and shiny, turn around.
