Update: The folks at Libsyn have added a function were you now can enter your primary RSS feed. Great job guys!
Libsyn has released a OPML directory with a listing of what appears most of their customers listed. I noticed one thing when I looked at it they are publishing their own RSS files and not those that correspond to many of their clients primary RSS feed.
The need to remedy this and allow their customers to enter the default RSS feed that they point all of their subscribers to. This is the same trouble that others have gotten into.