Revealing mistakes: During the final battle where Whistler throws Blade his sunglasses, Whistler's actions in the background are inconsistent, revealing that it was not a straight throw-and-catch and that some editing trickery was used.
Audio/visual unsynchronized: In the Vampire HQ when Scud hits Whistler the second time, we hear the sound of the punch first before we see the hit.
Continuity: During the opening action sequence, Blade briefly disappears from the alley during a special effects shot.
Audio/visual unsynchronized: When Blade, Whistler and Scud confront the head Vampire, an earlier shot of Whistler talking, but with the audio removed, is used as a reaction shot, leaving Whistler to appear to foolishly mouth a line he has just said.
Continuity: Nyssa tells Blade that she is a "pure blood" (born a vampire) but she has a scar above her lip and fillings in her teeth. According to the logic of the movie, a pure blood vampire would never scar and, we might infer, would never need dental treatment.
Crew or equipment visible: Towards the end of the film, a dead vampire is bleeding blue blood and the tube producing the "blood" is visible.
Continuity: In a close-up of Whistler after has speaks with Blade, Blade has jumped some distance away, where previously they were standing together (the shot of Blade walking away was cut).
Continuity: When Blade and the Bloodpack are in the vampire club searching, Verlaine has the UV Filter on her weapon on, but in the next shot it's off.
Continuity: The blood stain on the wall following Nomak's first attack in the blood bank.
Continuity: After Snowman stabs the mutant vampire in the nightclub, he places his hands on the hilt of his sword twice without taking them off.
Continuity: When Chupa is firing his machine gun at a fleeing Reaper in the vampire nightclub he accidentally shoots two ordinary vampires, one of whom is wearing a distinctive red outfit. Then in the next shot, the Reaper has moved along the wall a little way and Chupa is still firing at it he accidentally kills the same two ordinary vampires again. The distinctive outfits make it obvious.
Continuity: After the underground battle, Nyssa lies injured and a golden torc can be seen around her neck as she lies panting. In the next shot, Blade raises her head from the ground, and the torc is gone.
Continuity: When Whistler throws the sunglasses to Blade towards the end of the film, in the near shot of Blade catching the sunglasses, Whistler can clearly be seen in the background "throwing" the sunglasses again well after they are caught.
Continuity: After the fight scene between Blade, Asad, and Nyssa; where Blade tells the 2 of them to remove their masks, Nyssa begins to remove her mask with her left hand and then in the next shot we see it has become her right hand.
Crew or equipment visible: When the group is about to enter the House of Pain, a crew member can bee seen crouching next to the door when the Bloodpack approaches it.
Continuity: When Blade is put on the machine to drain his blood, the bed of spikes should pierce everything including his clothes, but later on we see that nothing has been pierced.
Continuity: When Blade first enters the Vampires headquarters, Nyssa pushes several buttons on a keypad that light up in red. When we see the keypad again, a different set of buttons are lit.
Continuity: When Blade fights Nomak the first time, they pass through enough daylight to cast shadows, but Nomak does not react to the light cast on him.
Continuity: When Rush is charging at Blade on the motorcycle he dodges Blade's weapon and Blade is crouching at the end of the alley. In the next shot Blade is standing and spins into a crouching position to catch his weapon.
Continuity: When Rush throws his motorcycle into a "lowside" skid Blade jumps over the tail of the bike, but the next shot shows him jump over and kick Rush square in the back.
Continuity: When the autopsy is performed it is one under ultra violet light which is harmful to vampires. This seems to have no effect on any of them.
Crew or equipment visible: When Damaskinos is running towards a helicopter to escape, a camera shadow is visible across his back.
Revealing mistakes: When Nyssa is dying in the sewer, Blade cuts his wrist to let her drink. But his sword has no blood on it.
Revealing mistakes: As Blade is walking across the scaffolding towards the camera, you can see the Nomak stuntman in the lower left of the shot, standing ready to be launched onto the scaffolding.
Continuity: In the big fight scene where Blade fights all the security guards, right before he kicks a guard into the pool of blood you can see a wire connected to the guard to pull him in the blood
Revealing mistakes: In the opening scene when Blade is chasing the vampires outside, Blade cuts off Rush's helmet using the bike tire, but where he is going to cut it there is already a pre-made crease in the helmet which splits perfectly without any effort.
Revealing mistakes: The gas masks used by the soldiers who electrocute both Blade and Whistler have removed the filters, rendering them completely useless.
Continuity: In the scene where Blade meets the blood pack for the first time, Nyssa orders them to put down their weapons. After everybody has lowered their weapon, we see how Snowman puts away his katana in the scabbard again.
Continuity: When Whistler looks through his infrared sniper scope as Blade and the pack walk into the first club only blade shows up with a heat signature, the full vampires show up as blue/green meaning no heat. Later in the sewer, Whistler looks through infrared goggles and now the vampires show off as red meaning they are giving off heat.
Continuity: When in the house of pain chasing Nomak, Blade tells Nyssa to wait here (in the hallway) since it's dawn outside as seen through the planks on the windows, yet it shows Scub at the same time in the plot trying to get the God lights to work on the truck since it's dark as night outside.