|Following a suggestion of Robert, I did a small improvement to the message view of the forum. Now not only the answers to a post a show below it, but rather the complete discussion thread. In this way you don't have to use the "Back" function of the browser any more to navigate a discussion thread. Hopefully in this way it is easier to follow a discussion.
Furthermore there now is also an "All" view, to which you can get by following the "All" link in the message view. This view shows all contributions to a discussion thread in one page in chronological order. The structure of the discussion (which message is in reply to which other message) isn't show in this view, however.