Have you tried:
– deactivating all plugins to see if this resolves the problem? If this works, re-activate the plugins one by one until you find the problematic plugin(s).
– switching to the Twenty Ten theme to rule out any theme-specific problems?
– resetting the plugins folder by FTP or PhpMyAdmin? Sometimes, an apparently inactive plugin can still cause problems.
I switched from feedburner to feedblitz thinking it had nothing to do with wordpress. I deactivated anything to do with feedburner: (1) Feedburner Email Widget & (2) FeedBurner FeedSmith. Then I deactivated anything to do with feedblitz: FeedBlitz FeedSmart. Just reactivated feedblitz feedsmart, and both feeds are working fine now. Not sure why, because the syndication post option is at -1? Should I be concerned because since Friday, I’ve been going back and forth with this issue?
leleanajohnson.com/feed
http://feeds.feedblitz.com/AWritersDen
http://feeds.feedburner.com/blogspot/gHNzy