During the "Previously on the West Wing" segment at the beginning, when Ainsley Hayes tells her friends "And I'm their lawyer," she says the word "lawyer" rather sharply and then looks pointedly at Bruce. In the original scene in the previous episode ("In This White House"), it was clearly a different filming of the line, which was said less angrily, with a bit of a smile playing about her lips (as she knows she's going to surprise them), and without the look upward at Bruce afterward.
It is shown that the Army Chief of Staff is a three star general, when in fact it is a position held by a four star general.
Since the Saturday morning radio address was originally intended to be recorded rather than broadcast live, there would be no need to spend most of the day repeating the entire speech from the beginning. If the President made a mistake, he could simply start again at that point and the mistakes could be edited out once the recording was complete.
President Bartlet is the former governor of New Hampshire - where tourists who come in to see the fall foliage are, indeed, known as "leaf peepers" or "peepers." Bartlet would never have questioned using this term in his radio broadcast, as shown in the intro to this episode.
President Bartlet says, "Leaf peeping? Is that something we do now?" yet any former governor of New Hampshire, a state with such a large tourism industry, would know that "leaf peeping" has been a term to describe fall foliage tourism at least as far back as the 1980s.
When CJ is addressing the General in her office she states that the General is wearing the "Distinguished Combat Service Medal". There is no such medal awarded by the US Department of Defense.
When confronting Leo in his office, Lionel Tribbey states that his cricket bat was given to him by "Her Royal Majesty Elizabeth Windsor". Queen Elizabeth II would never be formally referred to in this fashion. Instead, this would be Her Royal Majesty, Queen Elizabeth II, or simply Queen Elizabeth. She is never referred to by her surname.