Dark spot/mark on screen!! HELP!!!
 

I have a BB Curve 8520 and I've had it for just over a week. I've kept really good care of it. Everything was working great until this morning. I noticed a big mark on my screen that is brighter than the rest of the screen when the screen is turned on, but darker when its off. I also noticed that applying pressure to it makes it move around the screen quickly in different shapes, but returns to the center when I take my finger off. I used my hairdryer on it, and the mark/spot quickly disappeared but quickly reappeared once I turn the hairdryer off.

What is wrong with my phone?!?

I'm really annoyed, as it is a great phone, but I can hardly use it now!
:x:x:-(:bb::-(