usbptp filesystem for plan 9 doesnt implement flush no caching of downloaded objects may only work with my nikon coolpix p50 usbptp.c.old is the version for the old plan9 usb stack just for reference. tell me if your camera works or fails so we can make a list of supported devices or i can help you debugging :) you can contact me at: cinap_lenrek AT gmx DOT de