Is Overload the problem?
Assuming an overload of 12t, Kulverstukas's table (post 246) would suggest Vref(0) should be 24 km/hr higher, call it even 30 km/hr or 15 kt. But presumably (?) Vref = about 1.3 Vstall, so the stall margin would be nearer 100km/hr, and a 30 km/hr error shouldn't spell disaster. What am I missing? None of these recent revelations seem to fit the leaked voice recorder exclamations, do they?