The cliff notes version of this above-linked article is a photographer who took a photo of Prince in the 80s, licensed it to Andy Warhol who created a painting from the photograph and sold many many reproductions of the painting. The original photographer is now suing to obtain part of the profits from the reproductions because she took the original photograph.
I hope she loses the case. This would have long-term consequences for artists. In a black-and-white world, you would not be able to paint from a photograph for fear of setting off a lawsuit for using the original. What do you think? I think it would severely limit creativity, especially as a graphic designer.