Many thanks for clearing that up; the links you mentioned earlier were about the renumbering of the flight.
So there could have been some extra fuel from the previous Beijing to KL run.
Sorry, I wasn’t very clear. If you click on http://www.flightradar24.com/ and enter the flight numbers you can see the scheduled flights, outbound and return.
MH370 and MH371 have been renumbered.
CNN
US Officials: Investigators probe whether lithium batteries in cargo could have brought down plane.
Oh, boy ...