I don't know the answer, but basic color correction isn't really a cardinal sin like pasting/clone-stamping is. Performing white balance or converting to B/W is usually fine (after all, a lot of newsprint images end up B/W).

Here's some examples where this behavior has been uncovered: http://www.poynter.org/content/content_view.asp?id=28082

http://www.nytimes.com/slideshow/2009/07/05/magazine/2009070...