It seems like many of my transparent PNGs work in IE7 and 8, but there are a few that get an ugly black background where the transparencies occur. Here’s a DVD with a slight drop shadow:
I’ve read that it has to do with Photoshop not exporting PNG’s correctly. Someone told me to that Fireworks exports them correctly. But I don’t have Fireworks. Does anyone know how to configure Photoshop to export web safe PNG’s?