According to Rebecca Gwatney from the Arkansas delegation, the last line of the state's roll call speech was cut off by the Secretary. Instead of casting all 47 votes for Barack Obama, they only meant to cast 37, with 8 votes for Hillary Clinton. (Two of the state's 47 delegates were absent.) When the chair announced all 47 votes for Obama, many delegates from other states rose to cheer the state for their unanimous statement, which now appears to have only been a clerical mistake.
"It's no big deal," one Arkansas delegate told the Huffington Post.