Help, problem with macbook screen

Well i bought my macbook around 2 months ago. And all of a sudden a green vertical line runs from the bottom to the top. Ive taken the battery out then turned it back on and it goes, but then it comes back after i've had it on for like 10 minutes or so (it varies)
The line is really thin (like 1 millimeter or something)
My question is, what should i do? Is this common, ever happened to anyone else out there?
Would it be covered by my warranty?
Thanks in advanced guys. REALLY APPRECIATE IT
joel

Take it in to Apple and have them look at it. It could be a LCD problem, graphics problem, or even the Logic Board. Your machine is definitely under warranty - let them figure it out.

Also, I recommend making a backup of your hard drive to an external drive before taking it on in. Use Time Machine or another program such as SuperDuper or Carbon Copy Cloner.

Regards.