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.