Perry White calls the front desk to ask about a sandwich and coffee. Other times, it is emphatically stated that Perry doesn't drink coffee.
Jimmy Olsen's mother calls Clark after 1:00AM worried that he hasn't yet come home from work. In the next scenes, Clark, Perry White and his Newspaper Club staff, and Inspector Henderson, who is fully dressed and on the job, are all wide awake as they interact at that early hour of the morning.
When Clark is with Jimmy in White's office trying to open the cabinet containing the Superman file, he unintentionally makes a joke by telling Jimmy that the cabinet door has been" jimmied."
When the crook breaks into the file cabinet itI moves back and for easily which means it is empty inside.