Note to Apple: In 1996, when Netscape 3 ruled the world and PNG was a newcomer, handling PNG via the Quicktime plugin made sense. In 2002, both IE and Mozilla have made significant advances and can now render PNG natively. So make Quicktime stop grabbing PNG images by default! Quicktime doesn’t do this when the a PNG image is displayed inline within a page, but on links like this one.) And yes, I’ve turned off this behavior in Quicktime’s settings, and now IE displays PNGs natively. But Mozilla 0.9.7 continues to show PNGs via Quicktime :(.

Update: Re-installing Quicktime solved that one.