Audio problem: In the external shot of "The Orient Express Restaurant" where Daniel's mum sits down and says, "Guess what? I'm going to be training as a manager.", her mouth isn't moving at all.

Other: When Johnny is fighting in the competition at the end of the movie, his hair changes from being clean looking to looking sweaty, back to being clean.

Continuity: At the beginning when Daniel is playing soccer on the beach, he has a huge sweat stain on the back of his shirt right before he runs past Ali. Moments later, when he runs away from Ali, the sweat stain has drastically reduced in size.

Continuity: When Daniel is eating in the restaurant with his mother, from the exterior shot looking in the window, Daniel's hand is underneath his chin. But when it cuts to the inside of the restaurant, his hand is suddenly down near the table.

Continuity: At the very beginning, when we first see Daniel, he begins to talk with another lad. When Daniel and the other lad stop at the metal stairs to talk to an old lady, the other lad is resting his arm on the handrail and is also at the bottom of the staircase, yet in the following shot he is no longer resting on the handrail and is also a few steps up the stairs from what we saw in the first shot.

Continuity: When Daniel gets the spaghetti and sauce spilled all over him, his white pants are drenched with sauce all the way down to his crotch area. When he gets to Mr. Miyagi's house, he only has one faded streak of sauce on each leg and the rest of his pants are clean.

Continuity: During the bathroom scene where Daniel is about to take revenge out on Johnny, watch as Daniel uncoils the hose - it is very long and has several obvious kinks in it. However, as he turns on the water and Johnny runs out, the hose is a perfect straight shot, and MUCH shorter (and water flowing through the hose would not do this).

Audio problem: At the Country Club Dinner Dance, the band is playing the "Fascination Waltz", but the conductor's baton is at a faster tempo.

Continuity: When Daniel and Mr. Miyagi pull up in Mr. Miyagi's car at his house to start Daniel's training, it cuts to an overhead shot. Mr. Miyagi gets out and walks around the front of the car, and passes the front of the car. Yet in the following closeup he is passing the front of the car again.

Continuity: When Miyagi leaves Daniel a note to paint the house, the paint brush is visible in the background on the floor. The position of the paintbrush changes in the following shot when Daniel kicks the sheets off the top of the paint tins.

Continuity: When Daniel and Miyagi are in Miyagi's house, Miyagi walks away and comes back with a photo and hands it to Daniel. Daniel is holding the photo in his left hand on the corner, but when it cuts, he is now holding it with his right.

Continuity: When Daniel and Mr. Miyagi are in the Kobra Kai Dojo speaking with the Sensai, in one shot the Sensai points at Daniel, who is standing beside Mr. Miyagi. Then in the following shot, when the Sensai is pointing his finger at Mr. Miyagi, Daniel is now standing behind Mr. Miyagi.

Continuity: When Johnny is walking away from Ali, the shot cuts to Daniel lying down on the sand, and there are two guys behind him, one with brown hair and a red tie around his head and a blonde guy. In the following shot after the line "Where did you find this guy," the two guys are now shoulder to shoulder with the guy in the yellow shirt.

Continuity: When Daniel and his mother are in their new apartment, Daniel goes over to the sink to fill up a bowl of water. The two items on the top by the sink appear in the first shot, then disappear in a shot from behind Daniel then reappear again in a shot from the front.

Continuity: When Johnny and his gang jump Daniel at the chain fence, Johnny smashes the sign on the fence, yet in the following shot the sign is there again, then the shot after its broke again.

Continuity: When Daniel first moves into the apartment, he kicks the outside door open. Then we immediately see Daniel from the inside, and the positions of the pedals on his bike has changed.

Continuity: In the scene where Mr. Miyagi teaches Daniel defensive moves, Daniel blocks Mr. Miyagi's punches with his right hand on the 'paint the fence' move. Daniel then leaves his right hand high, in a defensive position. This shot is taken behind Daniel, over his left shoulder. The next shot, a side view with Daniel on the right of the screen, shows Daniel's left hand held higher, as if he'd used that hand all along.

Audio problem: During the beach fight between Johnny and Daniel right at the time Daniel runs at Johnny and Johnny trips him for the FIRST TIME, you can see some of Johnny's friends holding Ali back as she yells, "Johnny, Stop It." But if you look close, it is easy to tell her lips aren't moving at that point.

Continuity: In the beach party scene when the boom box is thrown at Daniel he catches it with the speakers facing away from him, but when it was thrown the speakers were facing him.

Deliberate "mistake": I have participated in several amateur karate tournaments over the years and I have yet to see one that is full contact without any protective equipment whatsoever, especially one in which all of the participants are minors. All of the contestants should at a minimum have had mouth guards, gloves and foot pads.