Continuity mistake: At the start of the fight in the club, the stain on Clouseau's jacket (from the accident with the parrot) is visible. Partway through the fight it has faded significantly. By the end of the fight it has gone.
Mrs. Leverlilly: You've ruined that piano! Clouseau: What is the price of one piano compared to the terrible crime that's been committed here? Mrs. Leverlilly: But that's a priceless Steinway! Clouseau: Not anymore.