A new update to SMF has been released, so the forums will need to be updated to it at some point. As always, due to the customizations and the use of addons (some of which have had to be installed manually and modified to be 2.1 compatible), it's not going to be as straightforward as just running the auto-update; but I'll look at sorting this update in the near future.
At this time I have no expected dates or other further details to share.
Hmm, just like that, SMF 2.1.6 was released yesterday, a few days after 2.1.5 was released. It's a minor hotfix for 2.1.5 according to the changelog.
Completely unrelated to this, but Firefox released two very quick versions too in the last few days, with the latest version released just today.
Well, guess we'll be upgrading to 2.1.6 then. :P