Trivia: Professor Plum reveals that he works for UNO, the United Nations Organization, in a branch called WHO, the World Health Organization. As such, he works for UNOWHO (You Know Who).
Trivia: Not a mistake, just a neat little fact. When the film was being shown at cinemas, only one ending was shown. Different venues had different endings.
Trivia: Professor Plum hypothesizes to the group that the brandy was poisoned. In the original Cluedo board game, poison was included among the possible weapons, and later re-introduced in 1990's game Clue Master Detective.
Trivia: Miss White's "flames on the side of my face" line was ad-libbed by Madeline Kahn.
Answer: No, Mrs. White was not in love with Wadsworth. She may have been slightly physically attracted to him at the time of the "hanky incident", but it is more likely that she only felt sympathy for this poor man. As for the playing with the tie incident, she only did that so he would let her out.