If you are logged in, you should have an option below the calfishing navigation, but above the messages that says either collapse topics or expand topics. This is similar to the old forum where it had the + sign. The formatting now is somewhat different though.

I personally like to expand the topics so I can see every single post listed so that I can click right to a recent post instead of having to click on the main post and then scroll down to the end to see a new post. I think this is the best option of you're checking the forum many times during the day. If you do find a thread that has multiple new posts in it, just click on view all right next to that thread and it will show you all the messages in that thread. Neato.

There is also an option now to expand and collapse an individual thread if you are viewing the page with the topics collapsed. This is less useful to me, but could be good if you were only interested in certain topics.