Google's Groups is a very handy Usenet archive. Furthermore, many people use it to participate in current discussion threads, especially those who don't have access to a newsgroup server.

Occasionally, Google manages to mess up the encodings of some messages. Sometimes, it's the posters' fault (who do not set up their encodings properly), and sometimes it's just Google's fault. With this little add-on, you can finally work around this irritating little "bug" with just a simple click