This also happens on (at least some) external microSDHC cards. See my earlier post: http://lists.maemo.org/pipermail//maemo-users/2008-February/009225.html A colleague has also observed this on full sized SD cards as well. It must be that some flash-memory vendor is partitioning/formatting them incorrectly during manufacturing. Probably Nokia doesn't repartition/reformat. Jeff (http://www.ece.purdue.edu/~qobi)