...So I just got a message from Steam saying that there had been a problem with the payment for the monthly subscription.
It isn't that I'm short of cash - I have plenty in the bank account, the card is valid, there are no problems there.
But... I checked the date and it wasn't due till tomorrow? Official payment date according to Steam is listed as the 10th, and right now it's only the 9th?
Did ESO glitch and try to charge me (or potentially any other Steam customers) a day early, and that's why it was auto-declined by Steam, and will it work if they try again tomorrow?