Continuity mistake: When Daredevil kicks Bullseye off his motorcycle, Bullseye has nothing in his hands when he's flying through the air, but when he lands he's holding Daredevil's baton. Watch closely when Daredevil's kick connects, and you can see they never even come close enough for Bullseye to grab the baton, or for him to snatch it if it was dropped.
Continuity mistake: When young Matt is taking a shortcut home and he sees his father beating up a man, he runs away. While he is running, he drops his report card. When we first see him, he is riding his skateboard and not holding anything. [This scene is actually edited from a much longer scene (it is included on the 2004 Director's Cut DVD). Matt was looking for his father at a construction site near the school, and learning he wasn't there, Matt drops his report card into the puddle. This is why, later, he is shown running away with only his skateboard. Still a mistake, but there's why.]
Continuity mistake: In the first church scene when Daredevil drops to the church floor, his cane falls to the floor immediately afterwards. However, towards the end of the flashback sequence when he falls to the floor, his cane never hits the ground, though it is given ample time to do so.
Continuity mistake: Close to the end of the scene where Elektra is practicing in her room with the sandbags, she throws a sai into the sandbag with Daredevils face painted on it. The camera then switches to behind her looking down the length of the room, showing the same sandbag without a sai in it.
Continuity mistake: In the scene following the death of Elektra's dad, we see Matt hitting all of his weapons and helmets to the ground. As he is he knocking down all his 'numchucks' you notice that one in the center stays on the hook. He puts his back to the wall and begins to slide down. If you look to the left of the screen the last weapon has disappeared.
Continuity mistake: In the scene where Matt Murdock's father is killed in the alley, Matt is wearing his father's robe and hood. As Matt runs towards his father's body the robe falls off and lands behind him. Matt kneels down, without turning, to hold his father, then when the camera pulls back the robe and hood have somehow moved several yards in front of them.
Continuity mistake: Young Matt is in the hospital. His dad walks into the room and you see a respirator machine and an IV bottle on the window side of the bed. His dad sits down on the same side. You now see the machines on the other side of the bed behind him. Matt comes over and hugs his dad, machines still behind them on the door side of the bed. The camera backs out of the door and the machines have moved to the window side of the bed again.
Continuity mistake: When Bullseye stabs Elektra it cuts to a view where you can see the sai go into her stomach and out her back. Then they go to a close up of Elektra's face to show the agonizing pain she is feeling. When they zoom back out, Bullseye still has the sai pressed up against her belly, but yet it's not sticking out of her back. Then he finally pulls the sai out of her stomach.