Hi all, I'm a long time browser here on the MacRumors forums but this is my first post. I couldn't figure out the source of certain white marks on my Air's (the most recent model) body (to the left of the tab key, right on the edge of the machine, above the headphone jack), so I thought I'd ask you guys. You can see some images of the marks here. The marks also seem to be accompanied by a sort of dent right beside the headphone jack. I have no idea how such a dent is possible. There also seems to be a bit of burning on the headphone jack (you likely cannot see it in the images). I say it seems to be burning because a portion of the jack has become brown. Does anyone have an idea of what could have caused this? Do you think I could take it to the Genius bar for a repair?