I have a Gigabeat F40 that has crashed twice. Once while navigating playlists and another time while navigating through different albums and playing songs from each . The screen would freeze up on whatever was showing on the screen and then would slowly fade to a white screen. The unit would then not respond until I turn the battery switch off and on, then reboot. My Gigabeat has version 3.2 stable build. Any ideas what that could be and what to do ? Thanks.