I occasionally get this in my car -- if I hold down the top button to power off the empeg, and then power it back again -- it usually fixes it. I haven't had to pull the empeg from the dash yet.

I suspect that it might be a software problem, but since I'm running v2.00-roger20020322, I can't comment on which released versions it affects . The version I'm running was built from the trunk in CVS (rather than from the v2.0-beta branch), and so probably still has bugs in it that are fixed in v2.0-beta

This is on a mk2a, if that adds a data point.