Eye catching mistakes...

See if you caught any of this when you watched Willy Wonka and The Chocolate Factory...

Revealing mistakes: When Charlie and Grandpa Joe float towards the fan, you can see the cables holding them up.
Revealing mistakes: When Violet turns into a blueberry, you can see the hose inflating her blueberry suit. (Full screen only.)
Revealing mistakes: When Willy Wonka does a pirouette and reaches to push the button for the Wonkavator doors, he misses the button, but the doors open anyway.
Continuity: Before Mike Teevee gets taken away, the Oompa Loompa shoe pom-poms are white. When the Oompa Loompas start singing the pom-poms are suddenly orange.
Continuity: In the final scene in Willy Wonka's office, the consistency of his hairstyle changes back and forth from neatly-gelled and manicured to flyaway and ungroomed.
Audio/visual unsynchronized: During the last Oompa Loompa musical number (following Mike Teevee's undoing), the Oompa Loompa in the foreground apparently doesn't know the words to the song.
Continuity: When Mike Teevee is going to send himself via Wonkavision, the cameraman (Oompa Loompa) puts his goggles on twice.
Incorrectly regarded as goofs: When everyone is in the hallway outside the nerve center, they are all crouched down; when Wonka opens the door they are all standing up straight with 6 feet of room on top of them. The room and hallway are full of other such optical illusions, so this is clearly an intentional artistic effect.
Revealing mistakes: When Wonka first allows the children into the chocolate room he makes an umbrella out of a "mushroom" top. As he twirls the umbrella you can see the stab holes in the Styrofoam bottom from prior takes.
Factual errors: The liquid issuing from the beehive on the machine that makes the chewing-gum meal is obviously not honey, as honey is more viscous.
Audio/visual unsynchronized: During their first song, the Oompa Loompas sing, "What are you at getting terribly fat", but the words flashing across the screen say, "Where are you at getting terribly fat".
Continuity: When Charlie opens his first Wonka bar and says he found the ticket, the bar is inside the plastic casing still, but when he turns around, it is out of the casing and in his other hand.
Crew or equipment visible: When Mike Teevee gets thrown back into the pots/pans after eating the exploding candy in the inventing room, you can clearly see the line attached to his belt that was used by a crew member to yank him backwards.
Crew or equipment visible: The wire holding the Wonkavator is visible as it flies over the city.
Continuity: When the Wonkavator appears for the first time, it appears completely different from the one that goes through the glass ceiling (e.g., the spire is missing from its roof, and there is less exterior trim)..
Revealing mistakes: When Willy Wonka does his somersalt on his way to meet the children, the mat on which he lands is visible under the carpet.
Continuity: When Charlie finds the coin and buys his first candy bar he stuffs as much as possible into his mouth, yet in the very next scene, his mouth is empty
Audio/visual unsynchronized: In the office, after Charlie is introduced to Slugworth, Wonka puts his hands on Charlie's shoulders. You can hear Wonka say, "You've won," but his lips don't move.
Miscellaneous: At the start of the movie when all the children are in the sweet shop, the shopkeeper lifts up a section of counter to go to the customer side of the counter and does not put the section of counter back down. The shopkeeper returns to behind the counter through another section of counter, and then re-opens the first section of counter to let the kids behind the counter. Also, when he lifts up the counter the second time, a girl by the counter clearly gets smacked on the chin by the rising counter.
Continuity: When everyone first enters the chocolate factory containing the chocolate river, the cast enters in reverse order of how they were positioned to in the previous scene when Wonka plays the musical lock on the door.
Revealing mistakes: When the Candyman gives the children the strip of dots on paper, you can clearly see the kids pretend to pick the candy off the paper and eat them.
Audio/visual unsynchronized: When Charlie and his family are watching the television, you can see and hear the anchor talking about the chocolate bars. In the next scene when you see Charlie talking to his grandpa, you can only hear the anchor talking because in the background (Full-screen only) the television is off. Although, in the next shot the television is in again.
Audio/visual unsynchronized: When the kids in the candy store are yelling, "Me, me!" their lips don't move.
Audio/visual unsynchronized: At the beginning of 'Cheer Up, Charlie' Mrs. Bucket's lips aren't moving with the music
Revealing mistakes: In Wonka's office, the clock's pendulum should be anchored under the number six; it is off-center to the right, thus breaking the harmony of everything being cut in half.
Revealing mistakes: When Willy Wonka is in his office, the light bulb in the half lamp on the desk is whole; breaking the trend of everything being cut in half.
Revealing mistakes: When Mike Teevee is telling his mom he feels fine after he got shrunken and put into the television, you can see where his platform ends to the left.
Revealing mistakes: When Willy Wonka rushes over to Augustus Gloop, Augustus can clearly be seen pushing himself into the river.
Audio/visual unsynchronized: When Charlie presses the button in the Wonkavator, you can hear Willy Wonka say 'There it goes", yet, his mouth does not match and you can tell that his audio was edited to say that.
Revealing mistakes: The two doors that Willy Wonka exits while coming out of the factory are fully lit but in the next shot from the point of view of the crowd, the right door is shadowed.
Revealing mistakes: You can clearly see that Willy Wonka is about to turn right down the red carpet but in the next shot, he has been pushed back toward the end of the stairs.
Revealing mistakes: After Willy Wonka shuts off the Everlasting Gobstopper machine, he goes to pick one off the conveyor belt to show to the guests. The conveyor belt pulls up briefly with the Gobstopper, revealing it was previously stuck to the belt.
Miscellaneous: In the scene where they are going through the tunnel of horrors, they are presumably traveling at a great speed. However there is no wind. In fact, this is due to the fact that the director and the wind-machine operator had a "blow-out" that day, and the director chose to shoot the scene without wind.
Revealing mistakes: The first time you see the world map on the news (indicating where the gold tickets are found), there is a hole/tear in the map around Montana -- this is the place where the marker "3" will be placed in later takes.
Revealing mistakes: When the girl is turned into a blueberry in Willy Wonka, it is clear once the loompas lay her on her back and roll her in the next shot it is a dummy.