Holy Smoke! Reading some of the infantile comments on this thread the casual observer could be forgiven for thinking a heated window arcing is a hitherto unheard of event. Window filaments arcing and transformers burning out has been happening almost since day one of having heated cockpit windows. Seems to me that having handled the abnormality and conducted a diversion to Guam the crew did exactly what they considered appropriate. Some posters give the media a bagging for beating up the airlines. Maybe those same posters ought to take a look at their own contributions and consider how uninformed and 'off thread' they are.