The Detroit Free Press reported in this article that Toyota is still trying to figure out the problem behind their runaway vehicles. Toyota continues to mention properly securing or removing floor mats to avoid having the gas pedal get stuck, but a lawsuit involving a Toyota Camry suddenly accelerating with no driver’s side mat in place questions the validity of the floor mat fix.
The unexpected acceleration has been blamed on the electronic throttle control system. Supposedly, radio waves and other electronic signals can interfere with the cruise control, causing it to lock down. In this situation, the brakes are unable to override. Toyota claims to have tested the electronics thoroughly and does not believe this is the problem. They say they are still searching for a "vehicle-based remedy". Hopefully, Toyota will come up with something soon and solve this extremely dangerous problem!