1. It was Malaysian that had the arrival fuel problem, like QF before it SQ actually followed their SOP and were legal.
2. Correct, Vs1.2 as oppose to QF Vs1.3 and when heavy that will give a cruise speed of .86.
3. Only one case of buffet and it wasn't altitude it was a failed CADC on the Capt's side that wasn't picked up as quickly as it should have been, it was a very subtle failure and didn't immediately produce the usual warnings.
Nothing like a good yarn though, is there!