In file
modules/mod_nicepoll/main_poll.php 
on 68 строке
$full_vote .= '["","'.$row["text"].'","'.$row["hits"].'"],';
replace on
$full_vote .= '["","'.iconv("utf-8", "cp1251", $row["text"]).'","'.$row["hits"].'"],';

 var colors = new Array("#ed1c24", "#39b54a", "#0000ff", "#cc9900", "#c7b299", "#0076a3","#005e20", "#000","#ed1c24", "#39b54a", "#0000ff", "#fff200", "#c7b299", "#0076a3","#005e20", "#cc3399", "#005552", "7b7d7b#", "#2ec8db", "#99ff00", "#ffff66", "#993366", "#5a1657");