Continuity mistake: At the start of the film, Shrek is painting his "Ogre Beware" sign, you will notice that quite a bit of the top left corner of the board is missing. When he hangs the board on the post it is the opposite corner that is gone. He did not paint on both sides. (00:02:35)
Continuity mistake: Sometimes Shrek's front door opens outwards, at other times inwards, yet it can't be "two-way" because whenever it closes, it slams against the frame. (00:10:55 - 00:13:45)
Other mistake: When a glass of milk is poured, if you look closely, the glass is filled but the level of milk in the bottle doesn't seem to lower. (00:16:00)
Continuity mistake: In the scene with Lord Farquaad and the Gingerbread Man, Farquaad crumples one of the Gingerbread Man's legs into dust, and some crumbs fall out of his hand. When he opens his hands again, there is no sign of any crumbs. The only way that this is possible is for every last bit of gingerbread to fall out of his clenched fist. (00:16:45)
Continuity mistake: In the scene where the mirror is brought in for Lord Farquaad, Gingerbread Man lies on a tray on the table. When the mirror is shown, and it cuts back to Lord Farquaad, the tray is moved to the other side of the table. (00:17:25)
Continuity mistake: When the magic mirror is brought in, we see the chain and hook that it is supposed to go on. Yet after the mirror is hung up, we pan around from the back of the mirror to the front and it appears that the chain has been attached to the back plate of the mirror. Where did the hook go? (00:17:30)
Continuity mistake: When Shrek backs into the two barrels at the tournament, they both have taps on them. He then bashes one of these off with the beer mug. But when Donkey rolls the other barrel the tap has vanished on that one as well. (00:24:00)
Continuity mistake: When Lord Farquaad announces Shrek as champion, there are flagposts surrounding them. In the close-up of Shrek and Donkey, these flagpoles have disappeared, as have the shields on the walls that the flagpoles stand on. (00:24:35)
Revealing mistake: When Donkey and Shrek are walking through the garden area, they pass some sheaves of wheat (presumably.) If you look carefully, you will notice that the wheat stalks were cut, not pulled up, but what were they cut from? There is only bare earth. (00:27:45)
Continuity mistake: In the scene where Donkey and Shrek are crossing the bridge to rescue the princess, Donkey trips and breaks a board. In subsequent shots sometimes you can see a little bit still stuck in the ropes, and sometimes it disappears. (00:30:35)
Continuity mistake: In the scene where Shrek falls through the roof of the castle, in the shots where Fiona is in the background you can see the flower pot is on a table next to the pillow on the bed. However when Fiona reaches to get the flowers she reached down to the floor and not back towards the table with the flowers on. (00:35:10)
Continuity mistake: On the bridge over the lava, when Donkey steps on one of the boards, it breaks down the middle into two pieces. But when we see it falling, it's the entire board as if it had come off without breaking. (00:36:30)
Continuity mistake: In the scene where Shrek is tangling the dragon's chain around the pillars, you notice that when Shrek crosses his own path, he jumps over the chain, but the dragon doesn't, so it would've been tripped over by the chain. And to make matters worse, when you see the camera focusing on Shrek, right before he tells Fiona and Donkey to head towards the exit, you can see the chain is high enough to run underneath without having to duck. (00:39:20)
Continuity mistake: When Fiona tears a piece of bark off a tree to make a door for the cave, the shape of the bark is different from the bare spot on the tree. (00:45:15)
Revealing mistake: When Shrek and Donkey are sitting by the fire and looking at the stars, when Donkey asks Shrek about "our swamp" and Shrek says "We?" When Shrek blinks, his right eyeball is slicing through his upper lid. (00:46:30)
Continuity mistake: In the scene immediately following Fiona's thrashing of Robin Hood and his Merry Men, Shrek is holding Donkey and they are staring at Fiona in disbelief. When Shrek drops Donkey and turns to follow Fiona, you can see his entire backside and it's unpierced. In the next scene, Fiona discovers an arrow in his rump that wasn't there before. (00:53:18)
Continuity mistake: When they are dining the second time, Shrek accidentally drops a cooked mouse, but when they stand up, the mouse is not there. (00:59:20)
Continuity mistake: The dragon flies down without a chain, then there is a chain dangling for Shrek to climb about to go to the castle, and while the dragon is flying, the chain is gone again. (01:14:05)
Continuity mistake: At the end of the film, the three blind mice are turned into the horses for the onion carriage but a second later they are dancing on the piano. (01:21:10 - 01:22:00)
Continuity mistake: In the scene where Shrek and Donkey are on the wooden bridge, when Shrek starts rocking the bridge, we see that the castle is still quite a way off. However, Donkey only takes a few steps to get to the end.
Chosen answer: This is most likely because "broad" isn't too nice of a word, and children of any age could watch the trailer. Parents wouldn't want their children to copy inapropriate language, obviously.
s.ounder