Same issue here. It's happened multiple times within the last 3-4
months. I can't put my finger on what would cause this. The posts are
not updated, they just appear to be randomly sent via feedburner. I'm
using Wordpress 2.8.x. Not good when this happens... makes subscribers
very confused, and some unsubscribe. Unacceptable.
Still no response from Google/Feedburner on this?!