I've bought one of these and its doing my head in. Unfortunately I think I've ditched the packaging so cant send it back. It wont work on anything other than a matt surface meaning for the first time in years I need to have a mousepad on my desk. In fact the only mousepad I could find I had to use upside down as it didnt like the surface on it. I bought it because I get on so well with the Razer Krait which I've been using for years now. Whats the difference in these two mice, so I can look out for it in future and avoid the duff type? According to the website (www.razorzone.com) they're both Infrared. Would messing with the DPI of the mouse improve stuff?