I do NOT want to be too dogmatic as it has been so long since this (and the previous) thread started to remember all the details, let alone theories.
However, If I remember correctly, the engine thrust was increased and decreased several times during descent without problems. In addition, the actual problems occured at slightly different times but ended up at almost exactly the same amout of (lack of) thrust. It seems almost impossible that the conditions in each tank were such that the "icing" (OR WHATEVER) acted at different times but ended up with the almost exactly the same results.
People grasped at the cavitation damage because IF (AND IT IS A BIG IF) the cavitation meant that pumps would work at x% capacity and this would show why the thrust fell to the levels that actually concerned. HOWEVER, as no definitive statements accompanied the last AAIB report it is questionable as to whether this is possible, or not.
It seems odd that nothing has arisen in the more than 9 months since the accident (and especially since the Northern Hemisphere Winter is near enough here) to actually guide airlines in possible ways to minimise a re-occurance of such an incident.
(Sorry for the CAPITALS - but people do have a tendency to go off on tangents if you don't spell things out).
.