Aishwarya Rai Bachchan was invited to the awards to be a presenter, but was unable to attend because she was filming for Mistress of Spices.
Golden Globe winner and Oscar-nominee Jan Sterling, who has died in 2004, was not shown during the "In Memoriam" segment.
Antonio Banderas performed (along with Carlos Santana) the theme song from The Motorcycle Diaries (2004) instead of singer/composer Jorge Drexler who performed in the movie but wasn't chosen by the Academy for the live show because he wasn't famous. Drexler eventually won the Oscar and instead of making a speech thanking everybody, he just kept singing the chorus of the song in the way it was supposed to be performed.