The forum will be upgraded on Tue Aug 11 around 05:00 UTC.
I will post here before it starts, and when it is completed. It will also be noted on the System Status page.
I am suspicious that there may be some issues with this upgrade, but hopefully it will be resolved within a few hours.
The forum will be going down for maintenance shortly.
I would recommend not posting until the forum maintenance is complete as the first step will be to backup the server and if the update fails for any reason the server will be restored from that backup.
The forum update should be complete now. If you see anything wrong, please let me know.