Banshee has trouble with the urls (to mp3s) in RSS feeds --  holds for all Radio France podcasts, including, for example:

http://radiofrance-podcast.net/podcast09/rss16260.xml

an example url reads:
http://rf.proxycast.org/m/media/296096201420/c=culture/p=France+Culture+-+LA+SUITE+DANS+LES+IDEES_16260/l3=20100626/l4=/http://media.radiofrance-podcast.net/podcast09/16260-26.06.2010-ITEMA_20233229-0.mp3

Banshee handles the RSS feed and loads the podcast "records" -- in fact, if you click on the line it will *play* the podcast -- but it fails to *download* the mp3. wget handles this url without a problem.

It looks like Banshee can't parse the RSS, here's some details from my log:
  at Migo.Syndication.FeedUpdateTask.OnDownloadDataReceived (System.Object sender, Migo.Net.DownloadStringCompletedEventArgs args) [0x00000] 
[Warn  15:40:01.991] Caught an exception - System.FormatException: Invalid RSS document. (in `Migo')
  at Migo.Syndication.RssParser.CheckRss () [0x00000] 
  at Migo.Syndication.RssParser..ctor (System.String url, System.String xml) [0x00000] 
  at Migo.Syndication.FeedUpdateTask.OnDownloadDataReceived (System.Object sender, Migo.Net.DownloadStringCompletedEventArgs args) [0x00000] 
[Warn  15:40:53.692] HttpDownloadTask France Culture - LA SUITE DANS LES IDEES - Qu'est ce que le pragmatisme ? Error: System.Net.WebException: The remote server returned an error: (404) Not Found.
  at System.Net.HttpWebRequest.CheckFinalStatus (System.Net.WebAsyncResult result) [0x00000] 
  at System.Net.HttpWebRequest.SetResponseData (System.Net.WebConnectionData data) [0x00000] 

Cheers,

Allen Riddell