On 1:Text:*`agree*:#: {
  If $readini(Popularity.ini,$Nick,entered) == yes) {
  If ($Nick == $2) (
    Notice $Nick You cannot vote for yourself!
    (Halt}
    Msg $chan $2 has earned 1 popularity by way of vote! Congratz!
    Inc Popularity.ini $nick

    }
  }
}

What\'s up with the \"(Halt}\" ? I guess you\'re brackets are a little messed up.

On 1:Text:*`agree*:#: {
  If $readini(Popularity.ini,$Nick,entered) == yes) {
    If ($Nick == $2) (
      Notice $Nick You cannot vote for yourself!
    }
    else {
      Msg $chan $2 has earned 1 popularity by way of vote! Congratz!
      Inc Popularity.ini $nick
    }
  }
}