I have set a node to private, and set all permissions to yes for my admin group. All other groups are not set (ie all set to inherit) If I analyze permissions for a member who is registered group (but not admin) I can see that (correctly) they cannot view the node. However all the other permissions show as yes, e.g. view threads. I assume this is safe, in that if they can't view the node, then they can't view the threads within in spite of the permissions saying yes. It seems a bit misleading, but is this correct?