This one is really clever, but you do have to turn the sound up a bit to hear the clue, which comes in about ten seconds from the start.
It is called "find the ghost", and it IS in the picture somewhere, although I couldnt see it at all to begin with. When you DO finally see it, it seems so obvious you wonder why you didnt see it at the beginning.
You just have to concentrate on the middle area of the room.
QUITE AMAZING................
http://www.philbrodieband.com/ghost.htm