XupiterToolbar
A quick search on Google finds plenty of info on this critter, and it's all bad. However, it's a problem for the user or browser and doesn't seem top have any adverse effects on the site being visited as far as I can see, so there's no point in blocking it as a user-agent.
status : not blocked
First noticed : 1992-12-19
earliest IP address : 64.122.62.226