Another conspiracy story claiming that Romney through several levels of company, controls a company that makes a type of voting machine that is used in many parts of the country:
"Through a closely held equity fund called Solamere, Mitt Romney and his wife, son and brother are major investors in an investment firm called H.I.G. Capital. H.I.G. in turn holds a majority share and three out of five board members in Hart Intercivic, a company that owns the notoriously faulty electronic voting machines that will count the ballots in swing state Ohio November 7. Hart machines will also be used elsewhere in the United States. (from "Does the Romney Family Own Your e-Vote?"
I haven't checked into this to determine if it's true.
And even if it is, it's a bit of a stretch to believe that this indirect corporate 'control' leads to high odds that the vote would be manipulated.