Hi InChina,
just the airfield temperature deviation and QNH.
Changing those values forces the computer to recalculate the descent profile. If it now thinks you are slightly high on this new profile, it will stupidly increase ROD in an attempt to capture the new profile rapidly. If the Barber's Pole is close - it's so easy for it to over speed. LVL CHG would have been a better mode until the margin was bigger.
Keel hauling crews for this sort of error is not the best way to educate them. I suspect there will be some floggings next - to help improve morale.