Hi Paul
Thanks for this, but there's a few things that make it less useful (for me). I tend to mainly use the What's New feature - previously, the threads I hadn't red were coloured blue so I could keep track of where I had got to, now everything's white.
Also, when I go to a thread, I'm sure the top menu stayed at the top of the screen so I didn't have to scroll back up to the top of the page of posts to hit the What's New button again - I do now.
Not the end of the world.
This is in Brave browser
OMG - that's subtle - just noticed that the unread threads are in bold, read threads aren't