Not working? Rated 4 out of 5 stars

I really love this add-on, it's my all time favorite. For some reason though recently, it won't let me download anything? This started happening on August 3rd, 2012. Can anyone help? I really love this add-on.

This review is for a previous version of the add-on (1.4.3.1-signed). 

Please install the latest version of the extension (1.4.4) from https://addons.mozilla.org/en-US/firefox/addon/download-youtube/versions/ . Hopefully this fixes the bugs. If there are still issues, clear the cookies for youtube.com and the browser's cache.