Continuity mistake: When Ivan is first brought to meet Hammer, Hammer is eating a dessert with a cherry on it. The cherry disappears and then reappears. The spoon also keeps swapping between being inside the food and by the saucer. (00:45:45)
Continuity mistake: In the second scene, when Cobb is taken to Saito (Old Man), Cobb's totem is kept on the table with the longer end down. But as the PoV changes to Saito's, the totem keeps changing position with the shorter end down. This happens at least four times. (00:01:45)
Continuity mistake: During the first fight, the boots of Alice change from high heels to no heels and back to high heels several times. (00:08:10)
Continuity mistake: Quorra's suit has a light stripe running down its right leg. When she's captured by Tron, the light stripe is now on the left leg. This is most likely a flipped shot as her fringe/bangs are also slanting the wrong way. (01:33:50)