Logged out, logged in, went to the General forum and found 9 topics with last posting dates between 10th and 25th October with new post markers.
Then went to Governing Bodies / NSRA forum and found 4 topics with last posting dates between 31st July and 15th October with new post markers.
Isn't there any way of reverting to the old version of the software before frustration overtakes interest.
Once they're set as new, logging out and back in isn't going to help until you've caused those thread to be marked as old first. Then log out and in to see a difference.
Worked here, multiple different OS / browser, some that stores cookies, some that don't.