ComScore abruptly loses top two executives

ComScore's top two executives have abruptly left the company, with CEO Bryan Wiener citing "irreconcilable differences" with the board. He's being replaced by an interim CEO, Dale Fuller, a board member.Wiener, who became CEO of ComScore last April, has stepped down along with President Sarah Hofstetter. Wiener was formerly executive chairman of Dentsu's 360i and Hoffstetter was CEO.Their departure comes as ComScore also adds three additional board members--former Chairman-CEO of WPP's GroupM I