Cate Blanchett blew kisses to the Cannes Film Festival audience as her new film, “Rumours,” earned a four-minute standing ovation at Cannes Film Festival on Saturday night. The crowd welcomed the film’s dark humor, laughing throughout the entirety of the late-night screening. While some of the auditorium emptied out while the credits rolled, the majority of filmgoers waited patiently to pay their respects to the film’s stars.