Yesterday when after writing an answer and trying to view this in "advanced" to see what this looks like, I got the "you are not logged in" error message. Although my FireFox clearly showed on the top of the forum my user name and the "Log out" button. I don't know if this is related to the other issues shown in this thread but it is strange indeed. I needed to log in again with another forum window in FireFox to post my reply.
Today, all is well on the forum front, go figure.
Lennard