Differences over a wide range of issues — from limits on live coverage in Tiananmen Square to allegations that freight shipments of TV broadcasting equipment are being held up in Chinese ports — surfaced in a contentious meeting late last month between Beijing organizers and high-ranking International Olympic Committee officials and TV executives — including those from NBC.In response to the complaints from broadcasters, Sun Weijia, head of media operations for the Beijing organizers, asked them to put it in writing, only to draw protests about mounting paperwork.