Dark spots under the LCD

I've started to notice several dark spots under the LCD of my MBP. I have thoroughly cleaned the surface of the LCD and the spots are certainly somewhere below the surface. Has anyone ever seen something like this before? To the best of my knowledge nothing has been spilled on the laptop. They are around all the edges of the screen.

http://img26.imageshack.us/img26/5871/img0986mwe.jpg