Now that's just pathetic, you buy a new computer and you have to glue a piece of plastic under a key to make it work correctly.
What you are observing here with the key toggle on the space bar is also observable to a lesser degree, but still noticeable, on all the keys on this keyboard. If you hit a key off-center there is a chance it will not register. This happens to me all the time, and from others comments about missed keystrokes, it happens quite often. I've said it before, ASUS, this is a horrible keyboard mechanical design and you should own up to it and fix it.