She tells Elle magazine: "I got to level 42, and I wasn't doing anything else anymore, so I had to stop." Unrelated: She sucked her thumb until she was 11.
I'm currently reading The Help and I'm cautiously optimistic that it will get better, but I don't know about the movie version — that might be too much. If I do go see it, I can tell you that it will certainly and primarily be for Ms. Stone. Here's to hoping she can keep it together and keep on working.