[Plugin: WP-Polls] Possible Malicious Javascript

I just found that wp-poll includes the following Javascript to my website:

<script src="http://stats.wordpress.com/e-201208.js" type="text/javascript"></script>
	<script type="text/javascript">
	st_go({v:'ext',j:'1:1.2.2',blog:'7943387',post:'0'});
	var load_cmc = function(){linktracker_init(7943387,0,2);};
	if ( typeof addLoadEvent != 'undefined' ) addLoadEvent(load_cmc);
	else load_cmc();
	</script>

And this also breaks the website. When I disabled wp-polls, the code disappears.

http://ww.wp.xz.cn/extend/plugins/wp-polls/