When Jack and CC are on the bridge, Jack's shopping bag disappears halfway through the scene.
When Tracy is trying to convince Kenneth to drink coffee, the level in his cappuccino changes. First it is full to froth with the brim, then it cuts to a shot where the level is much lower, then it cuts back to a shot where the mug is full to the brim.
The German that is being spoken at the beginning of the episode is nothing more than gibberish that is supposed to sound like German but in no way matches the subtitles.
Jack says that a small PA mining town is midway between his office in New York and CC's office in DC. The actual great circle midpoint between 30 Rockefeller Center (40.7590214N, 73.9816327W) and the Rayburn House Office Building (38.8870683N, 77.011249W) is Dartmouth Woods Park in Wilmington, DE.