Hi Peggie. "Conversations" are just like our old Private Messages and they can only be viewed by you and the person you sent it to. It's not a forum post.
I don't believe you could post a new thread from All Forums in the old software, either. It worked pretty much the same way this does, it's kind of a "view only" forum and when you click into a thread it takes you to the forum where it was originally posted.
So far as I can tell, there isn't any thread called "Possible to clean under v-berth." That is a "conversation" (Privates Message) you are having with one or more people. Not sure who started it or why but it is not public, and not a forum post.
To start a thread, all you do is click this button:
To reply to a post, click this immediately below the post you want to reply to:
It's that simple.
My job has been fine this week. This forum software is not buggy and is far more stable than VB ever was. It's also much more intuitive and easier to use than VB. You just have to take the time to learn where the few necessary buttons are.