During the "Ain't there anyone here for Love?" number, when Dorothy is walking between the two lines of athletes doing knee-bends, one of the men on the left towards the back gets up too late and fails to do his bend in time with the others.
During her confrontation with Lady Beekman, Lorelei calls Piggy "Lord Beekman". Later in the courtroom, Pritchard addresses Piggy as "Your Lordship". Piggy holds a knighthood, not a peerage, and would never be addressed in person as anything but "Sir Francis".