I've had the Air for about ten months. Yesterday it just shut down. Today I tried doing a reset and all is well. Does this mean there's a problem? I want to take it back before the warranty expires if something is defective. Also, when watching videos on Facebook, sometimes the audio on a video gets lower for a short time then gets gradually louder again. Is this a function of normalizing the loudness? Or is this a problem or a function of Facebook? I don't watch as many videos off FB so I'm not absolutely sure it wouldn't do it off FB as well. What do you think? Thanks so much for your help.