If you are currently using Wordpress 2.0.6 together with Feedburner, then please proceed to read on. Apparently there is a bug that output you an error message like this

Your server disconnected us before sending the full source feed content. If your blogging platform is TextPattern, this is a known bug, and a fix can be found here: http://forum.textpattern.com/viewtopic.php?id=11247

Neosmart.net has provided a detail explanation of the problem together with fixes.