I have a Wacom Graphire 3 running on OS 10.4.11. The tablet is usually trouble free but when I'm in Photoshop, it can be very glitchy. EXAMPLE: The Pen/Bezier tool all of a sudden is very unresponsive and starts "sticking" on vector points. Then, when I'm on the desktop the stylus starts trying to "marquee" whatever it touches- WITHOUT using the click button. I've downloaded the latest drivers from Wacom various times over the years but this never seems to help. The problem seems to generate in Photoshop, but I could be wrong. THANKS!