Thanks for posting Dave.
I have the D600 on my wishlist, I will probably get one sometime next year, but if this problem isnt resolved by the time I am ready to buy, I will be rethinking what I will do with my money.
I know you can just keep cleaning the sensor, this probably isn't a big deal to some, but its something I definitely would rather not have to do on a regular basis.
Surely Nikon is working to resolve this problem as we speak, lets hope so.