Some downtime is to be expected tonight, and perhaps tomorrow. I am doing several backup runs. For which the server needs to go down for a few minutes each time. All of these will in any case happen tonight.
Now either still tonight or tomorrow I will also run a upgrade of the forum. This may require quite a bit of downtime, but I am not sure of that yet (will to a test run on the backup first).
The forum upgrade is nothing spectacular, just a bug fix. (upgrading phpBB from 2.0.0 to 2.0.2).