1. The scene in the beginning of Jamal jumping into a hole full of human excrement to escape from the toilet is, I think, the most gratuitously offensive scene of the movie. It is not only unrealistic, it conveys the impression that a slum boy by nature has no sense of dignity in the way he presents himself, apart from the fact that anyone covered in excrement would not be able to approach within a mile of a super star like Bachchan.
2. Even admitting that our city cops do not have a very admirable human rights record, it seems inconceivable that they would administer the third degree, including stringing up and administering electric shocks to anyone other than hardened criminals and gangsters, to extract a confession. Most cops in Indian cities have enough to do, chasing hard core criminals and these days, even terrorists, to worry about one quiz contestant indulging in a bit of cheating in a game show by a private organisation, that too when no money has actually changed hands (Jamal returns the cheque to the quiz master in order to continue on the show).
3. One of the more distracting aspects I found, of the movie was the clipped British accent in which Dev Patel speaks. (Even Ben Kingsley in Gandhi made the effort to put on a generic Indian accent). Perhaps the exigencies of marketing the movie in the West forced the Director to have the main protagonists speak in English, however a bit of dubbing at the end could easily have fixed the absurdity of a slum kid growing up to not only speak English fluently, but to do so in an accent totally alien to his environment.
4. Finally, dare I say it, A. R. Rahman's music is completely pedestrian. Rahman himself has composed far better music (for example all the way back in Roja and Bombay to take but two examples) but this is not one of them.
I realise that I am putting myself at odds with about ninety percent of people and critics who have raved about the movie and the music -- but alas, I was taught by my mother to always tell the truth :)
Tailpiece: Take a look at the tomatometer and watch all the critics rave. Hey, am I missing something here?