Comment 2 for bug 445141

As an example, try adding this podcast (or almost any other itunesU based podcast)
http://deimos3.apple.com/WebObjects/Core.woa/Feed/cmu.edu.1335575211.01335575214
Now right click, download an episode, then right click another, download, repeat...
Notice that it says several episodes are downloaded, yet when you play them they are actually all the same one.
Also, go to the podcast's folder, it will only have one file, named enclosure.