bansama: Ah, was probably this error:

"Steam_RefreshLogin_InfoTicketExpired" "Steam-lippusi on vanhentunut.\nJatka antamalla salasanasi uudelleen."

which in English would be:

"Steam_RefreshLogin_InvalidPassword" "Your account credentials have expired.\nPlease re-enter your password to continue."

As far as I recall, that tends to happen when there are problems with the Steam network and ultimately, should be nothing to worry about.