I've implemented a threaded topic view for viewing the conversations instead of the old flat chronologically sorted view. Threaded is the default view from now on.
Each reply will now be below the post it's replying to.
When viewing an old previously visited topic, the display should jump to the first un-viewed post.
If you prefer the previous flat view, at the top of each thread there is a link for 'Flat View', it will switch you to the old view. In the flat view, the link is titled 'Threaded View' and will switch you to the new view.