Oscar Got It Wrong!: Best Actor 1952

The Contenders:

Kirk Douglas: The Bad and the Beautiful
Gary Cooper: High Noon (winner)
Alec Guinness: The Lavender Hill Mob
Jose Ferrer: Moulin Rouge
Marlon Brando: Viva Zapata!

Oscar Got It Wrong: Best Picture 1952

The Contenders:

The Greatest Show on Earth (winner)
High Noon
Ivanhoe
Moulin Rouge
The Quiet Man

Oscar Got It Wrong!: Best Actress 1952

The Contenders:

Shirley Booth: Come Back, Little Sheba (winner)
Julie Harris: The Member of the Wedding
Bette Davis: The Star
Joan Crawford: Sudden Fear
Susan Hayward: With a Song in My Heart

Oscar Got It Wrong!: Best Original Screenplay 1952

The Contenders:

The Atomic City
The Lavender Hill Mob (winner)
Pat and Mike
The Sound Barrier
Viva Zapata!

Oscar Got It Wrong!: Best Adapted Screenplay 1952

The Contenders:

5 Fingers
The Bad and the Beautiful (winner)
High Noon
The Man in the White Suit
The Quiet Man

Oscar Got It Wrong!: Best Director 1952

The Contenders:
Joseph L. Mankiewicz: 5 Fingers
Cecil B. DeMille: The Greatest Show on Earth
Fred Zinnemann: High Noon
John Huston: Moulin Rouge
John Ford: The Quiet Man (winner)