Yes I am referring to using the 1G cards for SD Audio, recording with the Panasonic software and Panasonic reader and playing back in the KN7000. The 1G Sandisk and Tpro cards were set up for friend who also has a KN7000 using the SD Audio facility. We did have problems with a couple of other makes of cards which were returned to the supplier. I can't recall the brands off hand but I believe I named them in a previous discussion on this topic. Also as previously mentioned I have a 512M card from PQI which is OK with SD audio whilst an older 256M card also branded PQI will not handle SD audio.
I believe Alec Pagida may have offered an explanation for problems with some cards in an early posting but I can't recall the details.