pngs are fine in IE. IE users don't see PNG transparency, that's all.
(
Mr. Bell Division,
Thu 16 Sep 2004, 21:03,
archived)
which makes them a bit rubbish in ie...as that is one of the main reasons people like to use them
(
eclectech is older but no wiser,
Thu 16 Sep 2004, 21:13,
archived)