Despite the success Superman gave the studio, a major blow to the studio would occur when the married Dave started having an adulterous affair with the Miami secretary. This led to many disputes between the Fleischer Brothers until Max and Dave were no longer speaking to each other. In 1941 they released "Mister Bug Goes to Town", unfortunately it was released a few days before the attack on Pearl Harbor, which caused "Mister Bug" to fail at the box-office. Shortly after the film's poor box office, Dave Fleischer, still maintaining his position as co-chief of his studio, had left Fleischer Studios to run Columbia Pictures' Screen Gems cartoons. Due to this, Paramount Pictures had expelled Dave and Max Fleischer from their positions as the head of the cartoon studio.