I removed wacom's old driver for my tablet. I then installed this update. I was really hoping that my tablet would now work properly when fast user switching was employed, but I was disappointed. I installed the new driver. I then switched to a second user. For that user it worked. I stayed logged in and switched to a third user and my mouse would not move across the screen. I logged out this user, then I logged out the second user and logged back into my user. Then, the mouse/tablet worked again. Fast user switching has never worked properly with this tablet on my computer, not since it was first instituted in Panther, and the problem continues on into Tiger.