In all of my time volunteering in polling stations and on the street, I have never once experienced any form of voter fraud. I have experienced situations where people, who are sometimes voting for the first time in their lives and really want to vote, are often turned away. Most of the people I deal with are more concerned about finding their next meal; they're not going from polling station to polling station trying to fabricate identification in order to vote numerous times. I don't know where this information is coming from, to be quite honest.
On December 11th, 2007. See this statement in context.