I had recently purchased one of the new 15" Powerbooks. Its a 1.67GHz model and I had used a mouse with it and used the trackpad infrequently. Not until I was on a business trip when I was using it, I noticed at times that the trackpad was unresponsive. It seemed like it was only after i was not using the trackpad for a more than a minute or so, that it would not be responsive, then after about 30 seconds or so, it would work just fine. Anyone have the same problem or any solution to fix it? BTW, I still love the Powerbook, its a great machine and hopefully, the trackpad issue is can be easily fixed. thanks.