The Podiobooks.com servers currently allow for 2 simultaneous download connections at a time. If a third connection is started, it will receive a 403 error message. Some Podcast aggregators have trouble with the 403 error and save the 403 error text as the mp3 file it was trying to download!
How to fix: If there is a setting in your podcast aggegator to download X number files at a time, set it to no more than two. If your podcast aggegator doesn’t have this feature, contact whomever makes the software and request the feature – cite this post if you wish 🙂
Had to write this before I forgot about writing it – it’s been so busy lately with a pregnant wife 🙂
UPDATE: Received email back from podiobooks.com. This is a temporary issue that they are working out with libsyn (which hosts their mp3s). This is good news 🙂