its no longer under warranty and therefore I cant contact the manufactuer Hopefully the genious' here can be of assistance. I have been successfully using a Wacom tablet running a Desktop G4 with a 28" monitor for a long time now. I am an illustrator and I use it for work everyday. The good news is that I just swapped the old ass G4 for a brand new MBP unibody. I set up the 28" monitor to display the MBP desktop and it looks great! However, the Wacom now performs HORRIBLY!!!!! I disconnected the 28" and tried the Wacom on just the MBP and the Wacom worked just fine. So, the problem is the MBP +external display+Wacom trying to work together. What do you guys suggest?