If the server kicks a bunch of people like that, unprovoked, it's usually a Blaze connection problem. There was one of these from Dallas earlier today, I know, that caused mass disconnections.
Blaze is hosted in the UK, which means that there's a lot of mileage between us and Blaze, and a lot of potential points of failure. If network maintenance is performed by a NSP or the 3rd party that operates the infrastructure for Blaze, they'll probably also do it in the early morning for them, which is near-peak-hours for us. It's not a great scenario for US hosts.
If thats the case, I wish we could see how UK based servers are doing, if they get the same types of mass disconnects like we do here in the US.