If you sell your books on Amazon KDP, go check your account settings. Chances are, your US payment was switched from EFT to check. When I checked, yep, sure enough, they'd done it to me, too. Worse, my address is outdated, still at our other house, where we no longer get mail.
And it won't let me change my address!
Grrr.
So go check your stuff and start complaining loudly to Amazon.
(Link to original post: http://indiebookspot.com/2012/11/24/kdp-glitch-changes-authors-payment-details-back-to-check-for-us-sales-refuses-to-accept-changes-again)
Thanks for the heads up!