Thanks heaps for that - very helpful! I must have been blind, when I went to Seat Guru I didn't see Jetstar, not that I knew which kind of plane I was on though...
On the re-assigning, we have booked the seats with extra leg-room, when I went to Bali in June we booked 1A/B both ways, but on the return leg they tried to move us... I just refused to accept another seat - I explained that I had paid extra and that they had better find a way to get me in 1A/B...
Does anyone know if there is a QF lounge near the Jetstar departures at NRT? We would love to have a shower before we leave

)