Boeing 787 : max range short fall?

[Torquelink]

Boeing website 17/01/2007: 787-8 range: 8,000 - 8,500 nm, 787-9: 8,600 - 8,800nm.

Boeing website 19/12/2007: 787-8 range: 7,650 - 8,200 nm, 787-9: 8,000 - 8,500 nm.

Seems to have lost 300 - 600 nm in range somewhere. . . oops