The old universes will be moved to the redesign in a couple of weeks.
Due to that we also have to update the servers.
That means: the servers, where the old v0.84x universes are running, have to get a new server-version.
When we update a server, there will be a downtime for about 30mins.
That means players won't be able to play, and they'll get a "Not found" error message or something like that.
We'll start with the update next week, Monday 12th.
According to our experiences we'll need about 2 weeks to update all old universes worldwide.
Unfortunately we're unable to tell you an exact timetable, what time which universe will be updated.
It's also possible, that universes of your country won't be updated in order (like start with uni1, then uni2, ...), it could be completely random.