This one involving John Howard and the fake de Kooning he bought for $4 million. Laura Gilbert has the story in The Art Newspaper: "The forgery scandal ... spawned ten lawsuits. Including Howard’s case, five of them have now settled. The trial of a sixth, brought by Sotheby’s chair Domenico De Sole and his wife, Eleanore, is scheduled to begin on 25 January."
UPDATE: More here.