I assume that a *ONE* bought before 8/31/06 will lock in the current QF fuel surcharges (even for flights after 8/31/06)? And if it is reissued later, the fuel surcharges may be recalculated at the post-8/31/06 rates?

Speaking of fuel surcharges, some of CX's are a little illogical. According to ITA, taking a direct flight from KHI to HKG (with stop in BKK) has a CX fuel surcharge of ~$61, whereas taking two different flight numbers KHI-BKK and BKK-HKG has a fuel surcharge of ~$15. Same route taken, same air miles flown. The table of CX fuel surcharges linked earlier supports this -- long-haul flights to/from HKG are $61, short-haul to/from HKG are $15, and others are $0, but it somehow doesn't seem fair (if you are flying on the "direct" flight)...