(EnergyAsia, November 4) — Singapore Airlines (SIA) said its April-to-September net profit fell 3.9% to S$578 million for the first half of financial year 2005-06 due largely to sharply higher jet fuel costs. (US$1=S$1.7).   Group operating profit was $584 million, down 6.3% from last year despite achieving record operating revenue of S$6,395 million.  …