I have this same problem and it drives me nuts. I can type "asdf" and instead of the correct key responses, I get "asdsafdf". No joke. You can see that they've released 6+ BIOS updates to try to fix this but it's still broken. Further, control, shift, and alt are extremely sensitive on where you apply pressure. If you press one of these keys on the side or the corner, it doesn't recognize that. Super frustrating.

With regard to the debounce issue, if you're running Ubuntu you can use dconf to set the slow keys timeout to a few ms (set slow keys to true as well) which will prevent basically all spurious extra keypresses. The theory being that your finger pressing a key sends a 'longer' signal than the bounce that sometimes occurs.

A side affect on my machine is that controlling brightness using the keyboard no longer works (other fn combinations still work) and pressing the power button no longer brings up the logout/suspend/etc menu. Somehow these keys always fire a really short press signal :|

So there's that.