During the sequence in which Jin finds the money Sun will use to pay his mother off (at around 1 min), Jin enters the apartment wearing a red tie. As the cameras cut back and forth through the scene, Jin can suddenly be seen wearing a striped blue tie. The colors of the tie alternate between red and striped blue throughout the scene.
When Juliet is performing an ultrasound scan on Sun, a heartbeat can be heard while performing a "B-mode Scan". Heartbeats can only be heard on an ultrasound machine when performing a "Doppler Scan", which detects blood flow. There is no indication that the system is operating in Doppler mode. This is a frequent goof that appears in many shows where ultrasound systems are used.
Desmond, Charlie, Hurley and Jin are somewhere in the jungle standing around Naomi who has been wounded after parachuting from a helicopter, when Mikhail suddenly appears. Jin chases Mikhail through the jungle for at least 30 seconds and Desmond and Charlie follow. After Jin catches and subdues Mikhail, Desmond and Charlie walk up. The scene suddenly shifts to Desmond holding a flare gun to Mikhail's chest, but now Hurley is there and they're still close enough to where Naomi was lying on the ground to hear her moaning and speaking in different languages. Not enough time has elapsed for them to have walked back to where they left Hurley and Naomi. However, there is a clear time jump in the cut between the close-up of Jin holding up Mikhail and Desmond pushing Mikhail against a tree.