During the next few days, we'll be moving to a new server. We'll try everything we can to make it as smooth as possible, but please don't panic if you encounter some weird things around that time. At some point we'll also need to disable map and scenario editing to avoid any glitches. Sorry for the inconvenience, and bear with us, we'll keep you posted about the progress.
UPDATE: Server move is complete. It looks like everything went as expected. Thanks for your patience everyone!