I'm having the same problem. It seems the rss changed, but nothing seems to work for my podcast clients. I hope they fix this soon since the podcast is sort of their product and all.
Since ep 1523 show my zune software gives this error on the BOL feed:
Can't retrieve episodes in this series. The RSS feed appears to be valid but no content was found.
Same deal on my android phone, via Google Listen--looks like the feed ends w/ep 1523.
Anybody else having this problem? Is there an official channel to report such problems?