Interesting -- I just pulled out my 20-segment AONE5 (ugly) paper ticket and noticed that the "X/O" column is BLANK for ALL segments. Is this going to be a problem? (only 2 segments are open, the rest are reserved)
Related question: I am currently booked SIN-HKG-NRT on a same-day connection. I am now considering doing an overnight in HKG, with transfer time of only about 12 hours, so I believe this does not constitue a stopover. Will there be any hassle in changing this reservation?