I have a macbook pro and recently I noticed that the ac adapter stopped lighting up and it stopped charging. I thought it might be the outlet so I brought it to one that I knew worked and it still wouldn't charge. I assumed that maybe the adapter was broken, but then all of a sudden it started working again. Has this happened to anyone and should I bring it in to get it fixed, or is there something else that could have caused it? EDIT: It seems like it will only charge when turned on in clambook mode...weird!