This happened to me and I was loading the SD Card to the KN7000. I wasn't aware that I had done anything different but I did notice that the little red light that comes on for a few seconds when first loaded then goes out, was taking longer than usual but like you, it wasn't until I came to actually use the card I realised that somehow it had been formatted. This was a new Panasonic SD card which I had bought only two weeks prior to this happening at a cost of around £70. I inspected the card and compared the markings on the gold bars with other SDs I have and I thought it didn't look right so I took the new card back to the shop (as it was under guarantee) together with one of my other cards and the assistant agreed with me the new card appeared to be faulty and he gave me another new card immediately which (fingers crossed) is working perfectly.

Of course, I wasn't able to regain my settings but from this mishap I have learned two things:-

1) always keep the SD Card "locked" and
2) always back up to PC or Floppy after each new setting(s) you add to it.

I know it doesn't help you to tell you all this but at least you will know you are not alone in experiencing this crash and the devastating affect it has.

Aud (U.K.)