I talked to the service guy at the dealership. He was well aware of the problem. He states that the late 06/early07 models do experince this problem. According to him, this is a software problem related to the "hill shifting function" of the adaptive transmission. Apparently the software needs some "fine tuning"-whatever that means. I scheduled an appointment later this month to have the problem fixed. We'll see what happens. Anybody else come up with anything good yet?