Yahweh70 gives us more evidence of the Arwen at Helms Deep cover-up (Read this earlier article): Brian Sibley noted at his recent Cambridge signing that during one of his visits to WETA, he saw the techies digitally remove what he called 'Arwen's attack at Helm's Deep'. I thought at the time he was joking, and making an insiders joke at all the internet rumours about the level of Arwen's film portrayal compared to her book appearances.