12/04/2008 05:12 am ET Updated May 25, 2011

Voting Machines In Michigan Flunked Pre-Election Tests, Don't Tally Votes Consistently

Optical-scan machines made by Election Systems & Software failed recent pre-election tests in a Michigan county, producing different tallies for the same ballots every time, the top election official in Oakland County revealed in a letter made public Monday.

The problems occurred during logic and accuracy tests in the run-up to this year's general election, Oakland County Clerk Ruth Johnson disclosed in a letter submitted October 24 (.pdf) to the federal Election Assistance Commission. The machines at issue are ES&S M-100 optical-scan machines, which read and tally election results.

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