Before today, my Nikon Coolpix 3200 never had a problem mounting in the Finder and in iPhoto when I connected it to USB port. Now, however, it will no longer mount. The problem started this afternoon after I had successfully imported pictures to iPhoto. The camera then suddenly dismounted on its own--I think maybe the batteries ran out and the camera turned itself off (?). A warning note came on the screen saying that the device had not been properly unmounted and some data may have been lost or damage may have occurred (something to that effect). I put new batteries in the camera and reconnected but it wouldn't remount. I restarted the computer both with the camera on and connected and with it disconnected. Still no mounting. Tried the other USB port. Still no mounting. System profiler shows it connected, however. Any advice? Thanks in advance!