well so far, the theory is that the problem is the encryption for digital audio, which goes through the card reader, but if you have the same number of contacts on your cards, perhaps the key is this extra (missing on kodak card) contact, so these cards may work for audio??

I think lexar also mention digital music players for their sd cards. If they mention digital music players this must include the panasonic players. And if the panasonic players are loaded through jukebox or a derivative program, maybe lexar also should work?