a typo.

Hundreds of absentee ballots sent to voters in New York State’s Rensselaer County, near Albany, were printed with Barack Obama’s last name spelled as “Osama." 

County elections officials tell the newspaper that it was a typo that made it by three rounds of proof-readers. They also said the error affected just a few hundred voters, and that they will re-send corrected ballots on request.

Three rounds of proof readers? 

 1. I find it funny that my agency's proof reader is more efficient than the governments.

2. Just a little fyi, on my keyboard, the "S" key, is no where near the "B" key. Im just saying...