Strange shadow on bottom of screen after waking from sleep

[superqwerty]

I just go the Macbook Pro 15" Penryn and when the screen wakes from sleep it has about 6-7 dark black shadowy marks on the bottom. They look like 1/2" thick parallel lines that go up about 1" from the bottom. I don't know exactly how to explain it but I thought that they would disappear after the screen warms up but they only go away when I turn the display completely dark and then bright again or if restart the computer. Any thoughts? Does anyone else have this problem?

 

[aan]

This?

http://discussions.apple.com/thread.jspa?threadID=1423301&tstart=0