What's happening is that when I join as a new member I see a list of all member galleries.
Please see screenshot.

Now I don't want the new user to see all new member galleries, only the new gallery created for them, and the public galleries set up for everyone to see. The galleries you see in the screengrab do not have any permissions set up so should not be shown.
We have around 7 sites with Community Server here and it's happening on some of them but not others, so I suspect this may be a settign hiden in teh Control Panel that I can't find.
Thankfully when the new user tries to post to any of these galleries they're unable to as they do not have the permissions and get this error message;

If anyone has any ideas let me know.