The live-action Ghost in the Shell adaptation infamously caused quite a stir when it was revealed that Scarlett Johansson would be portraying the film's protagonist, Motoko Kusanagi—a character who, if you can't tell already by her name, is Japanese in the source material.
Although some Japanese fans and the director of the 1995 anime adaptation saw no problem with Johansson's casting, it still drew accusations of whitewashing—something the filmmakers made worse when it was revealed that early in production, they'd toyed with the idea of making actors look more Asian by using CGI to "shift [their] ethnicity." They might have caused less controversy if they'd just said they were going to give Johansson buckteeth and ask her to talk like Mr. Yunioshi in Breakfast at Tiffany's.
After word leaked, a statement was quickly issued stating that even though they absolutely did toy with the idea of using CGI to make a character look more Asian, they never went ahead with it. It's nice that more sensible heads eventually prevailed, but still—that's pretty bad.