 Disneyland's opening day brought further problems for "Mark Twain".Actress Irene Dunne, star of the movie "Show Boat", had trouble breaking a bottle of water (from many major American rivers) across the vessel's bow for her christening on "Dateline Disney".During the riverboat's first official voyage, when the crowd moved to one side of the boat to view a passing scene of an Indian encampment or other sight, the boat would list from the side and water poured over the deck, as no one had determined "Mark Twain"s maximum safe passenger capacity.