Due to a recent update to Discourse and some re-organisation of the whole Digital Health Networks, you may have noticed a change in the way in which #nz-forum works.
When you click the 
in the top left you will now get the Categories page. This displays all the Categories visible to you as well as the latest topic feed (the most recent topics visible to you). I have set things so that you should only see categories relevant to New Zealand, but you can tweak this yourself by either Muting unwanted ones or Unmuting those of interest to you (look for the 
).
You can also select which page you want to be your homepage if you wish in the interface section of your profile.
There might be more changes over the next few weeks along these lines.