This driver originates from NVIDIA's developer zone. There's not much info on it other than it's a small update over the recently released WHQL driver.
We have a discussion/feedback thread open on these drivers right here.
A bucket load of GeForce graphics cards are supported though.
Download:
GeForce ForceWare 178.15 Vista 64-bit
GeForce ForceWare 178.15 Vista 32-bit