Do you use Safari and a version older than 5.1? Consider updating your browser for a more fluent user experience with WOT. In the older versions the rating window was injected to the page, which caused problems on some websites. Newer versions of Safari support native pop-ups for toolbar buttons like other browsers.

WOT in older versions of Safari. Click to enlarge.

WOT in Safari 5.1 and newer. Click to enlarge.