Character mistake: Near the end of the movie, Charlotte says she doesn't have the strength to climb down into the crate. Two seconds later, she climbs down to comfort Wilbur, then climbs back up. Even if she couldn't go all the way to the crate, she was low enough that Wilbur could have carried her there himself.
Charlotte's Web (1973)
1 character mistake - chronological order
Directed by: Charles A. Nichols, Iwao Takamoto
Starring: Debbie Reynolds, Paul Lynde, Henry Gibson, Rex Allen
Continuity mistake: They mention that the goose has hatched out 7 goslings. They say there were 8 eggs and one didn't hatch. The one egg is given to Templeton, and it is later smashed open. Later that night as they're going to sleep, the mother goose has 7 goslings under her, but then then it shows Jeffrey (one of the goslings) sleeping with Wilbur. Seems they had an extra gosling with the mother.
Charlotte: Chin up, chin up / Everybody loves a happy face / Wear it, share it / It'll brighten up the darkest place / Twinkle, sparkle / Let a little sunshine in / You'll be on the right side, looking at the bright side / Up with your chinny-chin-chin.