When Eko is comforting Ana Lucia at the ravine, he holds her and his left arm is over her left arm. When the camera angle changes, his arm is now under her arm.
When Goodwin and Ana Lucia are taking a break before their fight, the top of a white car is visible driving in between them in the background, from right to left.
Ana Lucia states that they were in the air for two hours, contradicting dialogue from the pilot that it was closer to eight (the last two of which were after changing course).