I was wondering the same thing about our podcast--it's literally been MONTHS. Calls to Microsoft for an answer got me nowhere.
Today I decided to manually add my podcast feed URL to the Zune software. It downloaded 3 of the latest episodes, and all the titles, etc. But it won't play my .mp4 files. It states "Can't Play -- This item is already in use. Close any programs that might be using it, or stop playing it and then try again." Error code C00D0FCF (80070020)
Here's the thing--I just booted the computer, started the Zune software, so I know it's not already in use. It must be the format of my H.264 .mp4 files. It just doesn't like it. I'm going to try formatting it to .wmv and see if it will play. Very frustrating, since the
specs state that H.264 files are supported.
The point is, I noticed your feed enclosures are for .mov files. You might be running into the same thing.
Try manually adding it to the Zune software and see if you can get them to play:
collection > podcasts > add a podcast
I'll let you know what I find out as well!