dmciii....you are correct! If the contract has banked 2003 points, with a use year of December, then the points now can only be used from December 1, 2004 until November 30, 2005.
AmyBeth...I know it's a little confusing, but December UY basically means that most trips will occur in the calendar year after the points are refreshed each year. The exception would be for December trips.