I sometimes have been unable to log in on Saturdays, while this time I just did not have access to trades and positions. Everything seems ok now, anyway.
Still down for me too, but I can now have access to the list of trades executed on Friday (which was unavailable the last time I logged in). Guess they are working on the issue in these hours.
I am having the same issue (trying to log-in from Italy), glad to see I am not the only one. I remember something similar happened some months ago, again on a Saturday.
Will try again in a couple of hours.