I've had a couple of loud clicks during my three-month usage of the empeg. Both times, rewinding the track has shown they're not mp3 errors. I haven't had the HD icon on, as it would have been interesting to see if it was caused by the buffering somehow being 'forgotten' and the data stream running out before the disk was spun up again.

It's never bothered me, and it doesn't seem to be physical - i've had it once in the car, on a smooth road, and once sat on the stereo at home.

A.