I’m posting this again because the original thread is way down in the noise and the issue is still current.
Private shares are not private. The DLNA server will find and deliver media even from shares marked as private and no DLNA. Let us suppose you have pictures of a previous girlfriend you don’t want your current girlfriend getting all weird about. So you put them in your private share. Your girfriend is browsing all the other pictures on the public share, and hey, there are all your private photos. Cool. Just what you really wanted.
How could a bug of this magnitude have escaped into the wild? It beggars belief. Anyway, if you are a new user, beware. You may be in for a surprise. When will it be fixed? No-one is saying.
Here is an earlier thread on the topic: