After upgrading to 3.3, it seems as if the media files (named the same as the post file, but should have a separate image folder URL) are overriding the post, as here:
http://www.thedigitalcameraexperts.com/best-digital-camera-lens/
If I rename the media file, as I did here, the problem goes away--but with 300 posts, I am hoping there is a better solution. Have already disabled plugins, themes, with no result.