The trackpad from my macbook air would not click anymore. The pointer still worked, i could still tap and hoover around.
My guess was that something fell between the trackpad and the housing.
And I was right, it was a bread crumb or else of a little seed.
While following this guide, I saw that a little magnet underneath the unibody is lifting the trackpad up again, after being pushed down. Right in that tiny space was the little bugger :)
I'm with Stefan, about his comment by step 8. I actually did destroy one screw (there sat really, really tight) and had to use brute force with a pincer and a tip of WD-40 to loosen it. It seems like Apple took that into account, since there are enough to leave one out :)
