i just thought id mention this in case anyone else has experienced such an issue. A few weeks ago, my pens side buttons stopped working completely. Because the pen still wrote, microsoft considered it a hardware failure, and posted me a free pen with no request for me to return the old one. Since the new pen arrived, i troed the old one a few times, still broken. Today however, i grabbed the spare faulty pen just to make a note, and lo and behold, the buttons work perfectly. The only change has been that there was a system update i installed today (not necessarily a new update, i can only update when i can) in short, if you had this button issue, get that pen out and try again, just in case. I now have a spare perfectly functional pen and it didnt cost me a penny. Given that i didnt touch it between the time it was faulty, and then functional, im left wondering why this is.