I've got an RSS feed I've subscribed to in Opera, but do not wish to receive anymore. Normally, to do this, I would either delete it, or simply uncheck it in the "Feeds -> Manage Feeds" dialog. However, doing this not only unsubscribes me, but deletes all of the previously downloaded posts as well, and takes the category away on my feeds menu! If I edit the feed to "never update", it only takes away automatic updates - if I manually refresh my feeds, it gets the new posts.
So, how can I actually unsubscribe, without losing every post previously downloaded?