Have deleted a feed (http://www.gizmodo.com/index.xml) from feedreader.
Now, when i try to re-add the feed, i get error message:
"You have already subscribed to this feed and it exists in the database"
The Gizmondo feed does not show up in the feedreader window.
Please open File > Feed
Please open File > Feed management. Locate Gizdomo feed there and delete it. Now you can re-subscribe to this feed.
Sometimes there occurs a bug that does not delete feeds physically when you delete it from feed tree. In this case you do not see feed in Feed tree but it's still visible in "Feed management"