This was the ending post here
http://drupal.org/node/48829
""OK, this likely means that we're sending a version of the feed that the
Drupal aggregator can't parse properly, which is a simple fix on our
end. Can someone who's got info on this shoot me an email at rickk@feedburner.com and I'll coordinate with our CTO on a deployment fix for our smartfeed service?""
I am only forwarding this so it does not get missed. I have no idea who the right person is.
Thanks for listening