I've recently noticed that my MBA 13" has a problem with the hinge, it is very loose for some reason and when i tilt it back around 100 degrees, from the surface it wobbles slightly and I am a little concerned. I've had this laptop since late January this year, but recently started noticing the issue, I'm worried after prolong use it can become more worse... should I get it checked by an Apple retail store, and is there anyone else experiencing the same problem? Any ideas would be appreciated.