Just reading the Japanese news and it is being reported that it wasn't smoke but a burning smell, and that the main battery(ies) in the forward electrical compartment have now been discovered to be off-color and discharging a liquid. (Japan Yahoo news in Japanese from TBS and JNN.) My translation.
Ｂ７８７緊急着陸、バッテリー変色し液漏れ(TBS系（JNN）) - Yahoo!ニュース
Evacuation video.
時事ドットコム：動画特集 「コックピットから煙」、７８７型機が高松空港に緊急着陸＝視聴 者提供映像
Last edited by jolihokistix; 16th Jan 2013 at 11:46.