I get that in my CTV occasionally too. It seemed to happen at least once per trip for a couple weeks, then it all but disappeared. I sometimes think it's a delay in the car re-engaging the tranny after coasting, decelerating or stopping. Like it's running free for a half second before engaging, maybe a little like dumping the clutch or revving in neutral and dumping it into D. Something like that. It hasn't happened for a while though and I can't think of anything that changed to blame it on.

psyshack, I think you have a good point about wearing a groove. However, I differ in a couple points. First of all, in the cvt both pulleys have to be variable. If one were fixed and the other variable, then the length of the belt would have to change to change the ratio, and I am pretty sure that's not happening.
Second, small cars have been using CVTs for years in europe. While it is new to the states, they're not a new idea for cars and that's one reason I wasn't afraid to get one. There may be some growing pains as the technology develops for larger vehicles, but that will only come with using them, so I'm all for it.