Other mistake: When Horton first crosses the bridge he breaks all of the planks. Then at the end when the angry mob goes to get him, they seem to have crossed the fully broken bridge to get to the other side.
Horton Hears a Who (2008)
1 other mistake - chronological order
Directed by: Jimmy Hayward, Steve Martino
Starring: Jim Carrey, Steve Carell, Will Arnett, Carol Burnett
Audio problem: The chairman talks to the mayor, and says that "no one supports you." When he says "supports", his lips look nothing like it.
Katie: In my world everyone is a pony, and they all eat rainbows, and poop butterflies.
More questions & answers from Horton Hears a Who
Answer: There is a possibility that that bridge wasn't the only one to lead to Mount Nool, just the closest one.
bobthedancingdonut