Just fried my second SD card! This was 4GB non-SDHC card in internal slot. The firmware is latest stock firmware. This occured in my SECOND N800 device that I got about a month ago. What this proves that it is not only some certain N800's that have this problem. (Or I was very unlucky to get two devices that have this issue!)

What I was doing I just copied my MaemoMapper files from PC to N800 using USB cable. In the middle of the process Windows gave error saying the destination folder can not be found... Sure enough the memory card was greyed out in N800 file manager. Rebooting N800 and removing reinserting the card does not make it visible. I tried it also in my external USB-SD card reader that does not recognize it either!!!

Nokia: Are you listening???