Continuity mistake: As Margaret enters Leo's office, the bottom corner of her ID tag is tucked into the sweater's button area. It remains this way when she stops walking. The camera reverses angle for a moment, yet we can still see she isn't moving. But the angle changes back and suddenly the ID hangs freely, dead center, over the buttons. Moments later, as she turns to leave, it's again tucked in.
Continuity mistake: When Ainsley Hayes and Lionel Tribbey are talking in her office, the bottled water moves from being to the right of the framed picture on her desk in the shots over her shoulder to being behind the picture in the shots of her desk from the front.
Continuity mistake: During the beginning before the opening credits, C.J. is briefing the press corps on the bus. In the outside shot of the bus, C.J. has her left arm resting on a rail, towards the door. When the shot changes to inside, C.J. has her right arm on a rail towards the driver.
Continuity mistake: When Josh first sits down at his computer, there are about 3 or 4 lines already typed in the email on the screen, but a few seconds later that has almost doubled. Even more inexplicably, when he finally starts 'typing' at about 28:05, he presses about 10-15 keys but two whole paragraphs pop up. This is not due to pasting copied text, as his hands are nowhere near the Control keys. Finally, at about 28:25 when Donna leaves, he turns back to a screen which is now back to the 3-4 lines.A less-detailed version of this has already been submitted, but I believe mine is clearer (and that other one has not been approved). :).
Continuity mistake: The President is watching Dial M for Murder with the staff and his daughter Ellie. In the beginning of the scene, the President is sitting behind Ellie and there is no empty chair next to her. Then he leaves the room. When he returns, his chair is suddenly placed next to Ellie.