Nokia Lumia :: 710 Camera - Vertical Line Showing On Screen

I have a Nokia Lumia 710 since April 2012. But, from today (9 September, 2012), it's camera stopped working properly. I clicked a pic and then put it in my pocket. I took it out five minutes later to take another one, and since then it's been showing a vertical line. I thought I busted the cover-glass. But it was spotless. So I did a reboot. That did not work. So I immediately checked some other applications that access the camera (like ShutterPro and Handyscan). They too showed the line. Then I reopened the camera app and I zoomed in and even the line got magnified. So I took a sample picture, and viewed it on my laptop. It is a pattern of dots. I enclose the photo with this.