At the beginning when the little boy has the nose bleed, the father's hand holding the tissue to his nose changes in between shots.
When Jasper gives the stolen flowers to Cameron, Chase picks up the card that belongs to them. He reads the card and then puts it back in the flowers, but while Cameron tells Jasper to return the flowers, Chase can be seen putting the card back again.
In the clinic, Cuddy berates House for not calling Social Services when a 6 year old is expected to have been abused. Throughout the entire conversation, the collar on Cuddy's blouse alternates between being folded in and being straight.
Another British English-ism: House tells his team to "punch the brat on the nose." An American would have said "in the nose."