If you've run into trouble with FeedBurner-powered podcast feeds, please try the Juice 2.2.2 test release I've rolled up for Windows:
http://prdownloads.sourceforge.net/juicereceiver/Juice-2.2.2-a1-Setup.exe
In other news, I'd much appreciate some assistance from any Mac-using, podcast-loving Python programmers out there with spare time to help on Mac testing and release.
Yours,
Garth.