Drevor's photostream

There is this weird black spot on my display.
I've never noticed it there before.
Two days ago a friend of mine saw it and pointed at it.
Neither of us has a clue why it is there and where it came from.
So we asked other people but no one had an answer.
I've asked the manufacturer but all I got was some lame excuse.
They said it is beyond their control.
They said it had to happen one day.
They said not to worry, I should just ignore it.
But what if there will be a second black spot tomorrow.
What if this one starts to grow?
What if I won't be able to see anything one day.

I am worried.