They don’t play nice.
Try this fix. It works.
http://www.iross.net/blog/2007/02/12/feedwordpress-and-bloggercom/
wp2.5.1 and wp2.6
revolution city theme 1.0
also- if feedburner is strippinng formatting
delete this line
var $strip_attrs = array ( array('[a-z]+', 'style'),
http://wordpress.org/support/topic/160988
