Continuity mistake: Baxter meets his neighbour for the first time as he is about to unlock the door. In the very first shot the doc lowers his arm, which is raised again in the close-up. (00:08:30)
Continuity mistake: Jake is opening Ian's locker, with Ian inside. He asks the third number of the combination; depending on the shot, he's holding the lock with both hands, or he has one hand on the door itself. (00:03:10)
Continuity mistake: Before going to bed, Scrooge takes off his slippers and puts them by the side of his bed. But when he is disturbed by the singers, the slippers and the pillows he is resting his head on have disappeared.