Revealing: At Wonka's factory gates (coming from his entrance door towards the gates on the right) there's a road traffic sign which states '(you are on a) priority road' on the road is bending to the left. I presume the set (gates, carpets, office) was build on an existing junction.

Revealing: In the Chocolate Room, there are several see-through pipes coming out of the chocolate. The chocolate is supposed to be being sucked upwards in all of them. However, in some of the pipes it is actually flowing downwards, since it was easier for the film-makers to only pump it upwards in some of them and then send it into the other pipes to go back down. This is confirmed when Augustus Gloop gets stuck in one of the up-pipes - there is no chocolate at all flowing in one of the down-pipes while he is stuck in there.

Visible crew/equipment: When Wonka finishes handing out the Everlasting Gobstoppers, you can see the shadow of the cameraman on Wonka as he walks away.

Continuity: When Wonka introduces the geese that lay the golden eggs, the geese change positions between shots.

Other: During the Oompa Loompas' first number (Augustus Gloop), the lyrics are animated on the screen - but one word doesn't match. The song line is "What are you at getting terribly fat"; the words on-screen read "WHERE are you at."

Revealing: When the computer technician is giving the computer commands on retrieving the location of the golden tickets, he is pressing the same two buttons over and over again.

Continuity: In an overhead shot of Wonka's boat, Charlie faces to the left, but in the closeup Charlie faces to the right.

Audio problem: When the crowd is mobbing Charlie after he finds the Golden Ticket, the man with grey hair says "Come on Charlie, hold onto it" but his lips don't move.

Continuity: When Charlie is watching the TV about the Golden tickets for the first time, he turns around to talk to Grandpa Joe. When he does, the TV is off.

Continuity: When Willy Wonka comes out of the factory to greet the children who will be touring that day, he walks down a red carpet.  A minute or so later the lucky children walk up the same carpet.  As the scenes cut back and forth between Wonka and the children the viewer sees a shadow on the carpet of the building next door. At one point the shadow has shifted noticeably and then reverts to its former position.

Continuity: When Wonka hugs Charlie saying he won, Wonka's hair at his left is unruly. When he invites "Slugworth" in, his hair is back in (better) shape.

Continuity: When Charlie sees the newspaper about how the fifth ticket was faked, the position of the newspaper in the man's hands changes between shots.

Revealing: When they show the different components of the 3 course meal gum machine, they show a bee's nest that supposedly generates honey. If you look at the coil of tubing you can see that water is dripping out of it, not honey.

Continuity: When Charlie first comes home after he's got the golden ticket, he hands the ticket to his grandfather to read. After he says, "You've done it Charlie." and hands the ticket back to Charlie, look carefully. The ticket is thinner, less wrinkled, and doesn't have any writing on it.

Revealing: When Mrs. Teevee puts the shrunken Mike into her purse, it is a very obvious fake Mike.

Audio problem: When Charlie and his grandpa are burping to get down after drinking the fizz drink, their mouths don't match up with the times or lengths of their burps. When Charlie gets his feet on the ground he takes a last burp and his mouth doesn't even move.

Other: In the scene where the newscaster is about to announce that the first gold ticket has been found, he walks over to a map of the world. Take a look at the northwest corner of the US. There is a big blue dot just to the right of Idaho that cuts through Montana and covers half of Wyoming. The dot is where the newscaster will later hang the number three marker.

Continuity: After Charlie gets the chocolate bar for his birthday the position of his fingers on the bar change between shots.