I posted about this quite recently. This is what the New York Times reports on the incident:
Among other things, Ms. Eaton says in her affidavit that a representative of Triad Governmental Systems, the Ohio firm that created and maintains the vote-counting software in dozens of Ohio counties, made several adjustments to the Hocking County tabulator last Friday, in advance of the state's recount, which is taking place this week.
Ohio recount rules require that only 3 percent of a county's votes be tallied by hand, and typically one or more whole precincts are selected and combined to get the 3 percent sample. After the hand count, the sample is fed into the tabulator. If there is no discrepancy, the remaining ballots can be counted by the machine. Otherwise, a hand recount must be done for the whole county.
Ms. Eaton contends that the Triad employee asked which precinct Hocking County planned to count as its representative 3 percent, and, upon being told, made further adjustments to the machine.
The president of the Triad company said that adjusting the machines for a recount is standard procedure.