Car Stall problems of the 2006 Kia Motor Amanti

Our 2006 kia Amanti occasionally will, when starting from a stopped position, will initially hesitate as if its going to stall. . . , then lunge/accelerate quickly forward. I've mentioned it to the dealers, but because it doesn't happen often, I've never really pressed them on this. . , but after reading the same complaint at this site, I wanted to document we also have experienced this. It probably occurs approx once every month, over the past couple years. It is potentially a dangerous condition, as the car could jump forward and hit pedestrians crossing in front of the car, or rear end cars near the front of the vehicle.