Other mistake: When Snoopy starts sneaking through the pumpkin patch, Sally is standing with her arms crossed and Sally's hand is painted blue while talking to Linus. (00:20:35)
Continuity mistake: When the kids are looking through their bags to see what they were given, suddenly a new kid in a ghost costume suddenly appears with them saying he got a quarter - he wasn't with them before.
Continuity mistake: When Snoopy arrives at the Halloween party, he slides down a set of curtains and then hides behind those curtains. In the same shot, Lucy approaches a tub of water atop which five apples are floating. When the shot changes, there are only four apples floating in the tub and Snoopy has now somehow gotten into the tub and is hiding under the water. The action is constant. How did Snoopy get from behind the curtain to under the water? (00:18:30)
Other mistake: When Lucy asks for an extra piece of candy for her brother during the Trick or Treat scene, her right hand has five fingers when she holds it up, but her left hand only has four fingers.
Continuity mistake: When Charlie Brown is with the others before he shows all the holes in his costume, he's holding it and it shows only 2 holes about where they should be. But then when he brings it up, it's covered in holes.
Continuity mistake: When Linus and Lucy are walking to the mailbox, he has a letter in his hand. For a couple frames this letter and his arm suddenly disappear before returning.
Character mistake: On the mailbox where Linus delivers his letter, on the side of the Mailbox is written "U.S Mail." That should be on the letter, not the mailbox. There should also be a period after the S making it U.S. Mail.
Other mistake: There is very little drawn correctly about the neighborhood as Lucy and Linus are walking through it in the beginning. There are houses dotted throughout, but all directly on the grass. There's no streets, no sidewalks, no driveways, and most don't even have a garage. However there is one random electric telephone pole they pass.
Continuity mistake: When Linus and Lucy are heading to the pumpkin patch at the beginning of the film, Linus takes his blanket with him, but when they pick up a pumpkin and march back, Linus no longer has his blanket.
Suggested correction: When they get to the pumpkin patch, Linus drops his blanket. When they leave, he leaves his blanket at the pumpkin patch. He might have forgotten it, but it's not a mistake.
