After six years of technological research, more than $4 billion spent by Washington on new machinery and a widespread overhaul of the nation's voting system, this month's midterm election revealed that the country is still far from able to ensure that every vote counts. Tens of thousands of voters, scattered across more than 25 states, encountered serious problems at the polls. The difficulties led to shortages of substitute paper ballots and long lines that caused many voters to leave without casting ballots. Voting experts say it is impossible to say how many votes were not counted that should have been. In Florida alone, the discrepancies ... amount to more than 60,000 votes. In Colorado, as many as 20,000 people gave up trying to vote ... as new online systems for verifying voter registrations crashed repeatedly. In Arkansas, election officials tallied votes three times in one county, and each time the number of ballots cast changed by more than 30,000. Election experts say that with electronic voting machines, the potential consequences of misdeeds or errors are of a [great] magnitude. A single software error can affect thousands of votes, especially with machines that keep no paper record. In Ohio, thousands of voters were turned away or forced to file provisional ballots by poll workers puzzled by voter-identification rules. In Pennsylvania, the machines crashed or refused to start, producing many reports of vote-flipping [where] voters press the button for one candidate but a different candidate's name appears on the screen. In Ohio, even a congressman, Steve Chabot, a Republican, was turned away from his polling place because the address listed on his driver's license was different than his home address.