I got my iTouch 2G this May though Amazon.com, those days I found that my left headphone doesn't work sometimes and I have to unplug it then plug again. I tried three headphones now and it seems they all can't work. I think something is wrong with my headphone plugin jet but there is no Apple Store in my area here. What should I do? If I mailed it to the apple store how much would it cost to repair it? Thx so much!!!