Barbet Schroeder returned to the Cannes Film Festival for the third time in his career with Amnesia which played on Tuesday in the Special Screenings section. And while the title sounds like it belongs to the suspense genre that Schroeder has made his mark with, Amnesia is quite a departure from the morally ambiguous characters the director has painted throughout his career; the most notable being Claus von Bulow in 1990’s Reversal of Fortune (which earned actor Jeremy…