My Macbook Air (2012 Model) has had problems recently with the trackpad. It occasionally does not want to recognize button clicks properly... and it is an issue that comes and goes. Someone recently clued me in to the fact that it is probably a battery issue. He said that the batteries can heat up in use, and swell a little bit, and it is located right below the trackpad button and can cause issues. So i could have sworn i read a while back that Apple may address these battery problems, even out of warranty. Unfortunately I ignored the story, as it didn't apply to me (at the time)... now i can't find it doing a search. Anyone know anything on this?