So I've got several Rockbox'd devices, 2x 5th gen Ipods, 1x Sansa Clip, 1x Sansa C240. I acquired a 4th gen ipod, Rockbox'd it, and proceeded to use it as I would any other DAP. However, when the device shuts down when triggered by the auto power off setting, the next reboot makes it revert to default settings, and songs aren't visible. If I flash Rockbox to it again, the songs become visible and everything is fine, until the next reboot from auto power power. Shutting the device down using the center and play buttons does not have this effect. Could it be an issue with the file system? Any help with this issue is most appreciated.