The speculation now turns to the QF incident:
This is from the Sydney Morning Herald:
Meanwhile, Qantas dampened speculation that the aircraft's loss could have been caused by the same fault that caused a Qantas Airbus A330-300 destined for Perth to experience a sudden drop in altitude last year, injuring 74 passengers.
A Qantas spokesman said the company's engineers were monitoring developments in France and would act on any directive issued by Airbus or air safety authorities.
Full article here
SMH Air France Debris