Constant 404 due to missing image

Ever since the latest update I keep seeing 404 errors for the following file:

/wp-content/plugins/wp-postratings/images/stars_flat(png)/rating_over.png

which is caused by this code:

<script type='text/javascript'>
/* <![CDATA[ */
var ratingsL10n = {"plugin_url":"https:\/\/www.MYDOMAIN.com\/wp-content\/plugins\/wp-postratings","ajax_url":"https:\/\/www.MYDOMAIN.com\/wp-admin\/admin-ajax.php","text_wait":"Please rate only 1 item at a time.","image":"stars_flat(png)","image_ext":"png","max":"5","show_loading":"1","show_fading":"1","custom":"0"};
var ratings_mouseover_image=new Image();ratings_mouseover_image.src="https://www.MYDOMAIN.com/wp-content/plugins/wp-postratings/images/stars_flat(png)/rating_over.png";;
/* ]]> */
</script>