I just read with interest your article, particularly as I called QF to amend an existing CR booking earlier today (CPT answered) and added a QF J SYD/HND segment departing October this year. I was charged taxes, etc. of $217 on my Amex (which I thought was pricey) but your article seems to indicate I should've only been charged $105+. I'm on hold with QF now to see what their story is.
EDIT: Of course your article mainly dealt with carrier charges, not the other "real" taxes which I didn't take into account and so repricing the ticket also meant higher charges, so I've been charged correctly by QF.
