From my quick time messing with it. It appeared to me that when you select a podcast for download, you must sit there patiently until it completes. Personally, I hit the back button thinking it would be downloading in the background. But when I returned, there was no indication that the file had been downloaded. When I pressed it again, I got 'error downloading' message. It is as if there is an existing/partial file somewhere that causes the attempt to download to fail.