Apparently, the last amazing adjustment I made to the RSS and ATOM feed settings at FeedBurner.com didn't take well. I have adjusted them yet again, and they appear to be functioning correctly, this time. Sorry I was not aware of the issue, as I don't see a need to subscribe to my own blog.
Go ahead... try clicking the ATOM and.or RSS icons, in the sidebar. They really, really work. (For real!)