A Boy Named Charlie Brown (1969)

Continuity mistake: When Charlie Brown is doing the dog food for Snoopy, the amount of food in Snoopy's dish changes between the kitchen and the dog house.

Continuity mistake: When Charlie's friends are watching the spelling bee on television, Violet says, "Atta boy, Charlie Brown, you can do it!", but in the very next shot Violet has disappeared.

Continuity mistake: When Charlie, Linus and Snoopy leave the Spelling Bee after Charlie lost, you can see they have nothing on their heads, but before they enter the coach at the Depot, they are all wearing hats.

Linus Van Pelt: You look like you've been through shock treatment or something.
Charlie Brown: What's more shocking than having your faults projected on a screen?

Linus Van Pelt: This blanket is a necessity. It keeps me from cracking up. It may be regarded as a spiritual tourniquet. Without it, I'd be nothing, a ship without a rudder.

Linus Van Pelt: Well, I can understand how you feel. You worked hard, studying for the spelling bee, and I suppose you feel you let everyone down, and you made a fool of yourself and everything. But did you notice something, Charlie Brown?
Charlie Brown: What's that?
Linus Van Pelt: The world didn't come to an end.