As mentioned last week, we will be having multiple downtime events. This weekend we will be upgrading the forum to 3.1.x. Like previously this will occur at
Some info about this upgrade. Unlike the previous forum upgrade that we did a few months ago, this one is a major upgrade with some visible changes.
The biggest of these changes is the forum theme. We are dropping the Pinkie and SubSilver2 themes for technical reasons. Pinkie is not supported for this new version of phpbb3, and while SubSilver2 is, it is being dropped in the next version of PhpBB which is expected to drop either this month or sometime early next year. Rather than mod the theme with org changes only to drop the theme after some months, we are choosing to forego it entirely so time can be spent on other things.
The next change is removal of tap-a-talk. The reason for the removal is that the updated Prosilver theme is now responsive, meaning that the layout of the forum changes as the browser window size changes. As a result, the upgraded forum renders well on phones and tablets and a third party app is no longer needed to get a decent mobile experience.
So those are the two potential negatives, the rest is fairly positive. If you are interested in what is changing, you can checkout the list here: https://www.phpbb.com/about/launch/ or the changelist