Plot hole: In the end of the movie, when Willy Wonka decides to visit his father, his father does not recognize him until he looks at his "rare teeth." But the wall of newspaper printings that Charlie was looking at included a recent enough picture of Willy that the father would have definitely recognized him, before seeing his teeth, as Willy doesn't look like a normal person with that outfit.
Charlie and the Chocolate Factory (2005)
1 plot hole - chronological order
Directed by: Tim Burton
Starring: Johnny Depp, Christopher Lee, Helena Bonham Carter, Freddie Highmore, David Kelly, Missi Pyle
Other mistake: In the beginning of the song about Augustus Gloop, computer generated Oompa Loompas can be seen running through the Chocolate Room, preparing to sing their song. In the DVD release, some Oompa Loompas can be seen running to places that no real person could possibly stand on. This mistake was later corrected in the Blu-Ray release.
Willy Wonka: Good morning starshine...the earth says hello!
More trivia for Charlie and the Chocolate Factory
Question: After young Willy sees his childhood home disappear, where did he live and grow up?
Answer: We are never shown what happened to him but he may have gone to live with relatives or he was simply put into an orphanage.