I was reading Daring Fireball as I do each day and noticed a blurb on Drew McLellan’s post about Transparent PNGs in Internet Explorer 6 on 24 ways.
I’ve been using PNG Fix by Bob Osola, for all of my foreground PNG files, and manually adding the IE image filters through conditionally included CSS for the background images. However SuperSlight does both, obviating this need.
My gratitude to those who keep reinventing wheels and making things better for the rest of us.