I don't think you're crazy, but I think the movie is short on "message". And I think the book, The Julie/Julia Project, is far better than the movie makes it out to be. (Poor Amy Adams - that terrible wig, and a part reduced to mostly whining.)
The sex scenes in the movie were non-explicit, and they were depictions of very healthy, happy, consensual relationships. You are unlikely to find anything in there that makes you uncomfortable, but there may be parts your daughter doesn't understand. In particular, there's one scene where Paul Child translates part of a roast chicken recipe for Julia, and he's clearly talking about sex. When I saw the movie, the audience cracked up, which may make your daughter ask questions about why it was funny, but again, I think it's unlikely to make you uncomfortable.
Finally - depictions of healthy, playful adult sexuality are so rare in media that if I had pre-teens, I might herd them past this one, just so that they'd have the notion of healthy, playful adult sexuality in their heads.