When Wen fires off his three shots at Spike in the final scene, one of the bullets nicks Spike on his right cheek, causing a small trickle of blood to flow. But later, when Spike goes over to the dying Wen, the nick and blood are both gone.
When Jet is looking up the "personal particulars" of Zebra and Giraffe on the computer, both say "Taking up the top of "NDVC" with "Giraffe". But for Giraffe it should say he did it with "Zebra" obviously.