I've been downloading podcasts from NPR-Fresh Air on to my iPhone 3GS (with 4 software)until today. Previously when I found the podcast I wanted and touched "FREE" i got a screen that said "INSTALL," and when I clicked, the podcast downloaded and installed in my iPod app. Now when I click "FREE" i see "GET EPISODE," and when i click that it appears to download, but disappears--not on the iPod app with the previous podcasts.