No decision on 30,000 more troops for Afghanistan?

While it has been widely reported that the Obama administration is set to approve an increase of up to 30,000 troops in Afghanistan, at least one senior aide to the president is pushing back. From Joe Klein's essay on problems confronting the new admistration: 

(Asked about the persistent reports from the Pentagon that up to 30,000 more troops are scheduled for Afghanistan, a senior Obama aide said, "No — repeat, no — decision has been made about troop levels in Afghanistan, and anyone at the Pentagon who says otherwise should be fired.")