It will say "new" next to it until you open it. Then if you hit your browser's 'back' button, it will still say new. Once you open a thread, go to the blue part up top where it says YFM350 Central :: General :: Shenanigans
and click on the forum you are in (ie shenanigans). Then it will not say new anymore. You can also use the forum jump at the bottom of the screen.