As I sat merrily working away yesterday I noticed a login problem when trying to access utopia-game.com. I checked with Sean but we thought nothing of it as we had no player reports (perhaps Thundergore had forgotten his password or something silly).
However we've had a few player reports today and have taken a closer look. There is an issue but it seems it is not widespread yet. The error messages, which include a reference to either a failed password or cookies being disabled, appear to be server load related.
We have an interim fix that we'll put up tomorrow.
In the meantime if you have prolonged issues with logging in this would be the cause and it will be fixed tomorrow I hope.
Thanks.