When Abhishek Bachan goes to invite Om Puri for Jagran, the particles of blended cotton stick to his clothes, but when he is about to leave all the particles disappear.
When Dadi first discloses that she wants to return to America, Rama is shown putting her head on Rajjo Bhabhi's shoulder. In the next scene, her head is up again, and she is visibly easing her head back onto Rajjo's shoulder.
The Monkey-Man incident occurred in Delhi in 2001--but the Delhi metro rail began in 2002.
The movie is set in 2001 but there are scenes showing rehearsals for Indian Idol, which did not begin until 2004.