In the scene where Helen is tidying Jake's apartment and he arrives home, there are two pictures on the wall, one of Jake and his Grandfather, and one of Jake and his son, however, Jake's son has not been born yet at that time.
When Jake and Helen are arguing in the office, clapper loader Shirin Fakhrai can be seen sat at one of the desks.
In the scene in which Jake drives off in his new car, the boom operator and boom can clearly be seen in the reflective silver windows.