Thanks. I did have some obnoxious QT files on my computer (a search revealed that there was supposedly a Quicktime folder in my start>programs menu, when there was no such folder. that's a little annoying).
Anyway, it didn't look like there were any QT associations for any files, and PNG is associated to Paint Shop Pro at the moment. I've got a Win2K box.
Apparently, Microsoft hasn't been too great with PNG implementation in IE. I don't really mind, it's just that I downloaded the program Weather Watcher, and it uses PNG maps for its sattelite and radar maps. Oh well, it doesn't matter because the author is changing that method anyway.
Thanks.
_________________________
Matt