AMES -- Mary Tiffany, an Iowa Republican Party official, confirms that at least one voting machine malfunctioned and that tabulators recounted at least 1500 ballots.

The state party rented optical scan machines from Diebold, a company at the center of several recent voting controversies. Recently, the state of California decertified Diebold machines for the 2008 election.

Yesterday, Iowans who support Ron Paul failed to get a judge to require a voter-verified paper ballot be used in today's straw poll. Separately, the state party told the Paul campaign that a full paper recount would cost $184,000.

Already, some Paul supporters are whispering about a challenge.