I can confirm everything that Tom said based on my VX, which probably hasn't had the driver's seat back tilted forward more than 10 times, and the passenger seat moved more than a couple dozen times. When the passenger seat back is released the seat will slide forward, though mine does move on it's own. It does not lock forward, and the spring action will not hold it all the way forward once released. The drivers seat does not slide forward at all when the seat back is released.
Gregg
2001 Proton Yellow #1379