I'll shortly be upgrading the software that runs this forum. The upgrade will probably happen tomorrow. This means that the forum will be unavailable for a while - hopefully less than an hour. When the forum comes back it will look a bit different, as shown in this screenshot.
The structure and functions of the forum will be much the same as before, but there will be a few improvements. When composing a post, there will be a button that allows you to see what your message will look like without having to press the Preview button. Things like bold text, smileys and links to images will be shown in the box you're typing into. The forum will also be more usable on mobile devices with small screens.
No doubt there will be a few other new features that forumites will discover. Conceivably there might also be some things that don't work properly after the upgrade - I'm sure people will let me know about them.