Did a little calculating, for the fund's holdings, total year end divi's total ~ 17,300,000. Divided by the ~66,000,000 shares outstanding, and you come up with $0.262 / share. The fund's total per share payout (Nov 1st 2008 - Oct 31st 2009) was $0.596 / share.
Math just doesn't add up to an extra payout in December.