As I have reported already, my 2.13 MBA has no visible lines.
I have not had time to put my new MBA through it's paces since I have been so busy this week, but I have noticed that when browsing and scrolling, dark elements on the page seem to flicker as the page scrolls, until it stops scrolling. Otherwise, the screen is crystal clear. Is this a MacBook Air screen issue? Is it present on all MBA screens, only affected screens, or is this common on laptop screens in general? It has been so long since I have used a laptop, it's difficult for me to remember.