Also from the DMR :

Voting machine difficulties delayed the announcement of the vote totals tonight at the Iowa Straw Poll. About 1,500 ballots needed to be recounted, said Mary Tiffany, a spokeswoman for Republican Party of Iowa. One machine caused the problem, said Chuck Laudner, the party’s executive director. At one point, its black box contained 500 paper ballots but the machine’s memory said it had scanned in 498. All the ballots fed into that machine throughout the day were hand counted, and now are being re-fed into the machine to recalculate the vote. “As soon as they get down to the bottom of that stack the results are finished and they’ll be up on the board,” Laudner said at 7:45 p.m. The machine was at a voting station in the Scheman Building, and the problem was noted by campaign poll-watchers before the poll closed.