@kjetilgf – Thank you for posting this solution. It worked right away and there’s no way I would have figured this out without your tip.
Great. Thanks for the quick reply.
Following marywy2’s advice above – ensure you are pulling a 2.0 feed into feedburner – solved my problem right away. If you’re also using the feedburner plugin, make sure that you get the RSS 2.0 feed address from there, not the default.