Originally Posted by
t1nt1n
Now ... if only QF would let me redeem LHR-SIN ... everytime I enter credit card details it tells me that they expect 2-40 chars. in the address field. I'll have to give them a call tomorrow.

I'd that problem before. I don't think it's the number of characters, but it may be due to any special characters that you might have entered.
I got told off by QF Call Centre once for hassling them for such trivial matters. Also, don't forget they may want to ping you 2500 points for the privilage of talking to them.