After running into some issues during the earlier downtime with the upgrade process, I was able do some dark and arcane database rituals and we're now on Tikiwiki 20.1; huzzah!!!
There's some lingering CSS weirdness with font size in the side bar and buttons that I'll address over the next few days. Any other issues you run into with font size, let me know and I'll throw a fix on it. The default styling changed dramatically between 18 and 20.
Take things for a test drive! Try to edit, restore old versions of pages, make posts, upload images, search — report anything that goes haywire here for us to look into.
Thanks for your patience the past few days! Takawiki would not be what it is today without the vast community of contributors and users.
See you next year!