This via Gizmodo:
Remember the voting machines in West Virginia that just couldn't bring themselves to let people vote Obama? Jackson County Clerk Jeff Waybright, who "hates stories like this" was good enough to show Video the Vote how a mis-calibrated voting machine would take a vote for Obama (or anyone) and turn it into a vote for another candidate—and not necessarily John McCain, either, though that's what would happen if you picked a straight Democratic ticket.
Fortunately, New York State is still using machines from the 1940s and 50s, so we don't need to worry about our votes being changed. We just need to worry about our votes being tallied at all.