I recently had the same problem on my '08 SE and they could not reproduce the problem at first. However, after waiting for the wife and it cut off on me 4 times, I practically flew to the dealership and it cut off on the tech that was examining it. Approximately an hour later, it was found that the throttle body was the culprit and they had a TSB for it.
Since then, I have not only noticed it not cutting off, I also noticed that the gas mileage and performance are actually better.