During the VE celebration in Edmonton, only one Canadian flag was being waved, while there were many British Union Jacks- one of which was flying upside down.
When Lily is collecting eggs for the first time, she gets two and puts them in the basket she is carrying. When she turns round to get more, the basket is half full, with at least 8 eggs.
That had to be the most poorly done childbirth scene on film.
Montreal Station is shown as a small provincial whistle-stop, obviously with a new name board superimposed on the real station name. In reality Montreal Central station is a large and imposing edifice.
The second scene is set at a dance in a pub. The wall is decorated with the flags of UK, USA and Canada. The modern Canadian flag, not the 1941 flag, is used.
At Charlie's welcome home party, a Bushmill's Whisky bottle is shown with a screw top lid. Most liquor bottles of the time, Bushmill's included had a cork stopper, not a screw cap.
The telephone Lily is using at the 82 min mark is inaccurate for the 1940s.