"A Wired article quoted a Diebold engineer as saying that his team made no fewer than three rounds of software changes to the machines in Georgia's 2002 election for governor--after the machines had been certified but before the election began. (That election "ended in a major upset that defied all polls and put a Republican in the governor's seat for the first time in more than 130 years.")

But Ren Bucholz of the Electronic Frontier Foundation (action.eff.org) told me that this kind of thing--casual, uninspected software updates to voting machines that have already been certified--goes on all the time."