This was submitted by a reader in Germany (thanks R.)
Do you see something unusual on the first page?
Than it was explained to me that the memory buffer was increased for the current D3 model without making too much noise:
nikonusa.com D3 brochure, page 20: Buffer capacity 18, 12bit NEF
above german link: after the upgrade Buffer capacity 43, 12bit NEF
Preparing for the D3x?