Although my Tivo v6 remote control is still like brand new, and I've tried two changes of new batteries, there seems to be a fault with it.I thought it was the actaul TIVO v6 at first as scrolling around was completely erratic and I thought it was a faulty IR sensor.
It will work for a few seconds then not work. If left for a while it will work again for a few seconds.
At the moment I have been using the old Tivo remote control but prefer the new compact v6 one. The old remote works 100% so its not a Tivo v6 box issue.