Hello and Merry Christmas to everyone reading this. I'm delighted to say that I've received my camera and I'm no longer seeing the problem! I suppose only time can tell since I didn't have a solid recreate, but they did take/test it with a few thousand shots without any failure. So all is good. Right?
Now that its back I can do debug my next gear problem....
Seriously though.. A special thanks to everyone that helped me put together a solid argument for there being a hardware problem.
Merry Christmas and Happy New Year!