Continuity mistake: The chalkboard for Eeyore's tail. Owl writes the word "tail" but spelled with an E and not an I, then later when he goes back to it the word changes to "queue."
Continuity mistake: Near the end of the film, Pooh is presented with a huge pot filled to the top with honey, which is overflowing and running down the outside of the pot. Pooh climbs to the top of the pot and jumps in. Suddenly the honey, even with Pooh swimming in it, is several inches from the top.