Later today we will be doing a web server upgrade – we have to do this about every 2 years to ensure that we continue getting all of the latest security updates, etc.
For the most part this won’t impact users, with one annoying exception: everyone will be signed out and have to log back in.
Our hope is that this particular upgrade will be the last time all users are forced to log in again after a server upgrade – we are switching to a new technique that is less prone to change. That said, we can’t guarantee that future versions of our platform won’t change things on us again.