HELP! Odd download error for our podcast

Question

the site is www.tuffpodcast.com.
Feedburner: http://feeds.feedburner.com/TUFFPodcast
We've grown to almost 600 subscribers in the past 7 weeks, and for the past 2 have had off and on problems. We can't find the problem, and it appears to be something weird going on in itunes. You can listen to the episodes fine from our web-site and from our feedburner address, but sometimes they will download in itunes and sometime they won't.
We wrote our own rss file according to the apple guidelines, it is here: www.bruzzies.com/tuffpodcast/TUFFpodcast.rss
We have also set up a test blogger page to see if it is our rss file but that one is doing the same thing - sometimes working sometimes not: http://feeds.feedburner.com/tufftest
So, I'm thinking it has to do with our hosting account at godaddy or the mp3 files since it is probably not the rss feed. That or ITunes is doing something funky that we cant figure out. Godaddy is saying everything is fine on their end.
Need some help!! Why would it sometimes work and sometimes not work???
Dell   Windows XP Pro  

Answer 1

http://discussions.apple.com/thread.jspa?threadID=636051&tstart=0
and
http://discussions.apple.com/thread.jspa?threadID=643980&tstart=0
It most likely has to do with Godaddy's masking of your homepage to give you your URL.
I've had BIG problems with GODADDY in this regard.
The way I got it to fix, was I took the long URL
for my site ( members.cox.net/membername/folder/file.rss)
and I put THAT into my feedburner feed, as the URL where
my RSS resides. Then, I use the feedburner short feed
(feeds.feedburner.com/nameofeed) and publish THAT into iTunes.
My feed works 100% in iTunes no problem.
I also made my 1 click subscribe (iptc:)
the feedburner link (iptc://feeds.feedburner.com/nameoffeed)
and it works fine.
I've emailed them and they told me the same thing as you,
but the proof is in the doing: it's the Way they mask your
space so that you get www.thisme.com. It interferes
with DNS resolves...check it in feedvalidator.org,
it does the same thing..sometimes yes its valid, sometimes no its not.
But if you put it in the long (URL)way, its valid 100% of the time.