Aperture not Publishing to Flickr
One of the searches I did on another site said that Mountain Lion is too aggressive in it's energy saving mode. I went into System Preferences, then Energy Saver. My computer sleep and display sleep were both set at 12 minutes. I temporarily changed Computer sleep to 2 hours. When I came back, all the photos were uploaded and Aperture no longer said Publishing.
If I find the link, I will post it.