Hey Toby,

That makes a lot of sense. It definitely is the larger of the two icons, and it happens while he is running at the gym, with the lock switch on. He keeps it in the cupholder on the treadmill, but would still be subject to some vibration as his feet hit the mat.

Is it possible that while he's running, if the player is unable to read from the disk due to vibration, that the unit would reset? If so, I think that brings us full-circle on how and why it is locking up. In that case, replacing the unit most likely wouldn't help, as a new unit would be just as vulnerable to vibration.

Hmm. Perhaps an armband would be more gentle on it. Or a flash player just for running.

Thanks for the info!
--Dan.