Factual error: When Ewan McGregor's young wife is hanging clothes in her backyard, a small digital satellite dish is visible on the rooftop of one of the houses in the background. This isn't something that should seem out of ordinary, except for the fact that the events in the scene were supposed to be taking place during the Korean War. These dishes weren't commonly seen on rooftops until the mid to late 90s.
Continuity mistake: At the dinner table when Josephine tells about her article about Morocco Will's mother says "We have to pick up a copy", Will is holding a fork and his other hand is under the table. When it cuts the way he holds the fork change and his other hand is resting on the table.
Continuity mistake: As Will sleeps beside his unconscious father in the hospital, some papers are visible on his lap. In the next shot, he wakes to tend to his suddenly conscious father, and the papers disappear. No sound suggests they fell to the floor, Will makes no movements to account for them being on his lap, and in later shots, they are missing from the scene altogether.