Karl, mine work fine, the only time I see issues is when large amounts of data are being written. For example untarring 200-300mb file, when in those high IO situations, I see reboots and data coruption about 50% of the time. When I am not dumping large tar files my cards seem to work fine. Its a firmware problem, that needs to be addressed by Nokia!!! I am just running fsck on boot everytime on my mounted partition