Brenda Chapman, set to be Pixar's first female director with Brave (formerly The Bear and the Bow), has reportedly left the film and been replaced by One-Man Band director and Pixar story artist Mark Andrews, according to Cartoon Brew.
If the news is indeed true, it's disappointing, as she was set to be the studio's first female director and the film, set amid a Scottish royal family hundreds of years ago, sounds promising. Then again, changing directors mid-stream is something that Pixar has done several times before (Ratatouille, anyone?) and it's usually worked out, so it probably shouldn't be a surprise. Chapman has reportedly left the studio completely, after being effectively sidelined as director some time ago.
The film is due out on June 15, 2012, so there's still quite a lot of time for massive changes to the story and characters before then, given Pixar's traditional working methods.