Corrected entry: While the movie is set in Montreal, many locations are in Quebec City. The worst example of this is the Chateau Frontenac, which is very much not in Montreal. They even make a point of showing Mrs Asher being put up in the Chateau.
Corrected entry: When they exhume Martin's body, Angelina Jolie and the two doctors are standing over the body in the morgue without covering their noses or wearing masks. They are inspecting and having a conversation around a 15 year old corpse without a hint of an odor. Most people couldn't stay in the same room as a corpse due to the foul odor.