Hey guys - out of curiosity, were either of you using IE for your browser?
I looked at this in Chrome and I wasn't having any trouble with it at all, and it seemed to work fine in Firefox, but when I tried it in IE I realized that the browser would only show you the cached page when you went back to the ratings view after voting, making it look as though your rating didn't take. I added a couple of tags to the popup window to make the browser pull a fresh updated page from the server each time it loads the page, which should have eliminated that problem.
Please let me know if you're still having issues.