The work around to this is a bit fiddly (don't really want to post direct links as their pretty big files)
1. Download Safari (horrible Apple internet browser)
2. load up the page with the podcast you want eg: HERE
3. Press Ctrl + Alt + A on the keyboard or Window > Activity
4. Look for the file (generally at the bottom) with .mp3
5. Double click and it will open in a new window (you can File > Save As from here, Ctrl + S)
6. Enjoy/uninstall Safari
If Father Peter says I can, I can post the direct links but then you miss the accompanying article etc.