'Open' groups can be seen by everyone, even guests to the forum (i.e. not logged in). 'Secret' groups and their 'blackboard' can be seen by all forum members, but only group members can view the 'Gallery', 'Events' and 'Forums' tabs. Members-only messages on the 'blackboard' can be viewed by any forum member, but not forum guests. Public messages on the 'blackboard' can be viewed by anyone (even forum guests) We are a secret group. The above information comes from @Komposten
I removed the quote because of the issue with visibility Figured I'd put the reference up again as soon as it was resolved..
Update just now from Wreybies/I edited the original post from Komposten to the best of my current knowledge: This group-forum is indeed only visible to group-members. The thread titles show up in 'Recent Threads' for regular members, but if they try to access the post they get an error and can't view. I suggest we use the blackboard for status back-and-forth, and the forum proper for serious discussions. And now: Three cheers and beers for Wreybies and Komposten! They have browbeaten the software into shape and have given up considerable time to help us. Thank you guys!
Well hurrah indeed. I guess even the software gremlins are frightened of those big hammers they carry.