Brian

If you're rating them while logged in, it still stores a cookie on your computer to indicate that you have already rated the image. This is done to prevent a member from rating an image, then logging out and rating it again. It wouldn't be hard to remove either the cookie and/or IP check, but you'd be opening yourself up to allow multiple votes. If you'll let me know which you would like to do though I can tell you what code would need to be changed.