UPDATE 2012.03.19: the MBP described in this post is now broken and recycled (logic board fried). The replacement doesn't manifest the same problems. I tend to believe the problem originated in the keyboard firmware of the old MBP.
Every now and then, usually after I haven't pressed a key in some time, sometimes minutes, sometimes seconds, my MBP will "swallow" the the first key I press ...
say I'm logging into "superuser.com" .. I start typing my username and the textbox will show "exu" instead of "lexu"
This is driving me nuts!
My guess is the keyboard or it's controller goes to sleep and fails to wake up propperly ...
What can I do about this?
PS: I've already installed "MacBook, MacBook Pro Keyboard Firmware Update 1.0"