Custom Rating Images don't work

Dear all,

first of all thanks for this great plugin, works like charm for my project.

I’m using version 2.5.8 of your plugin. My goal is to use a 3 star custom image rating scheme with 3 big 30x30px images.

I started modifying the large quartz yellow with 5 star rating scheme, using the power user settings and this code snipped:

options.style = RW.CUSTOM;
options.imgUrl = {
    ltr: "http://imageaddress.com/img.ltr.png",
    ltr: "http://imageaddress.com/img.rtl.png"
};

I created a png according to the large sprite size dimensions given here:
http://rating-widget.com/contribute-rating-design/

But on the frontend the new sprites aren’t used… The JS code is included and executed, because the other options work (like hide the rating information).
The rating shapes though in the sense, that there is a fallback to the Yellow Stars.

Is there something wrong with the png? Right now it is 180x30px with 6 icons included a 30px. Just like the description says..

Thanks a lot

https://wordpress.org/plugins/rating-widget/