it should work now, try again please !
Sorry, got caught up in E3.
I've tried again multiple times and get the same result :'(
Again I'm not sure if it's an anti-piracy measured implemented in this new OS or a bug in the early beta. I'll try again in the next beta update :)
An easy solution would be launching the podcast via desktop iTunes, and launching quicktime in house screen recording/audio recording.
(Located when you click quicktime and top explore panel under 'file')