Constantly being disconnected from the servers.

[Lord Blade]

I don't know why, but lately I get disconnected all the time. I'll be playing along and notice the chat seems quiet. I try to talk and such, but nothing comes up. When I go to the main menu I see I'm not logged in, and the server won't let me connect.

[tylor]

Ditto, sometimes there is no chat at all, sometimes it keeps connecting and disconnecting, sometimes it works ok. Also, I often can't log in. Not a steam.
My internet connection is not likely to blame, because I can perfectly play Dota2, for example.

[HousePet]

The server may be having trouble with the additional load.

[IvenGray]

Been haunted for hours by the same problem. I logged in my account in the main page, but when I created characters, the connection to server was down. Able to chat online for most of the time, but my characters can't be registered into the online character vaults.

And yes, I believe the problem originates from the server being too busy.