I've been finding this, too, though I was blaming IE6...

What I ended up doing was using the minibrowser in WinAmp - when you click on the MP3 or M3U, it goes straight to the player.

Also, if you get annoyed with always seeing the default page in the minibrowser you can change it by replacing the file "winampmb.htm" in the WinAmp directory. I've changed mine to one that immediately redirects to Hijack's 101?.html page.

Bryan.