Election fraud?

Election fraud?  A few days ago I posted about reports of voting machines in Illinois registering votes for Democrats when the voter tried to select Republican candidates.  The election officials called that a “calibration error” and said it was limited to a single machine.  Since then, many more cases have been reported, in Maryland as well as Illinois.  Both states are notorious for their past history of election fraud.  For some reason, that made me suspicious :)

Now there's video (from Moline, Illinois) of this “calibration error” in action.  You decide: fraud or calibration error?