Try this:
Turn on the HD Icon in Emplode/JEmplode, and resync.
See if it happens when the icon is hollow with a BRIGHT center line..

This happens to mine all the time, whenever the HD icon is like that. (Other times, it works fine.) Also on 2.0 and latest Hijack.
(Basically, what I think is with mine is that the drive is too slow at the interrupt, and taking IRQ/interrupt time away from the buttons/remote, etc.)

Me.