When Veronica (Kristen Bell) and Norris (Theo Rossi) are in the garage and Veronica is using the throwing stars, a star can be seen in the left hand of the target after she throws it. They cut away to Veronica and Norris and when they show the target again the star is gone.
When Veronica discovers the count-down clock on the computer, the timer says 46 hours, 16 minutes, and 28 seconds. And in less than a second, it changes to 46 hours, 15 minutes, and 26 seconds.
Corny's hand jumps from the edge of his locker to his side between shots.
The panda pencil sharpener from the episode Betty and Veronica (2005) can be seen on Veronica's (Kristen Bell) desk, even though she broke it apart to get to a bug Clarence Wiedman (Christopher B. Duncan) had planted.
When Veronica (Kristen Bell) first visits KillEmAll.net, the countdown reads 46 hours 16 minutes and 27 seconds, but an instant later it reads 46 hours 15 minutes and 25 seconds.
When Veronica and Logan kiss outside the Camelot, the camera crane swings around to film them and a crew member can be seen hiding around the corner, sitting on the ground, and as the camera swings back to the right some cables and equipment bags are visible on the adjacent roof.