Thanks for the heads-up Kieran - I've just been having a play. It was good timing because I'm just setting up a new Forum.
The template-cache threw me initially ["why aren't my changes appearing?!?!"] but once I stopped swearing at the keyboard and actually
read the tabs on the admin panel, all became clear!
The conversion from 2.0.22 worked seamlessly.
It's looking good so far - couple of small niggles with my template mods [style sheet clashes mainly] but once it's all working I'll post a screenshot.
Andy