LCD, uneven back light

[LoveHomeTheatre]

After about a year and a half of use, the LCD is starting to show what I believe is called Clouding. There appears to be patches or parts of the screen that are visibly lighter than others, especially around the corners of the TV and around the middle-right of the screen. It doesn't affect viewing habits unless dark scenes come on, it is quite noticeable to me anyways. Should this be an issue worth getting technical help for? We bought it at Best Buy and plan to talk about it. We are under their extended warranty.