"Standard & Poor's accidentally released a message to some of its subscribers on Thursday saying that it had downgraded French debt from its top AAA rating. S&P said it was investigating what had gone wrong and stressed that France still had an AAA rating." [BBC]
France Pledges To Keep Ex-Pat Taxes, Snide Comments About Financial Sector To A Minimum If London Bankers Will Give It A Chance
That's how you know they're serious.