Continuity mistake: At the end when they "fly" out the ship you can see there are still high waves from the storm, but in the long shot of the ship exploding, the surrounding sea is a lot calmer.
Continuity mistake: When Beowulf is rescuing Pendra, at the end of the fight he is holding is sword over one of the men. In some shots it is clean, in others it has blood on it. (00:08:00)
Continuity mistake: After the two main characters sled down the mountain in that boat, they all fall into the river. In the next shot, they come up from underwater, and the boat miraculously is right-side-up with no water in it.
Continuity mistake: When the guy throws the second shovel of dirt on the red haired man, only his lower part of the back gets dirty. Two shots later the dirt is all up his back. (00:45:00)
Continuity mistake: In the scene when Nick Chen (Chow Yun-Fat) talks to Jack (Jon Kit Lee) at the NYC Correction, the shot facing Nick shows him grabing Jack's face by the chin. The next shot, facing Jack, shows Nick's hand around Jack's neck. The final shot facing Nick again shows his hand back on the chin. (00:58:50)
Continuity mistake: In the scene where the grandson is eating ice cream in the Cozy Corner, the ice cream dish is almost full. It then cuts to Sully's face, then back to the grandson and the ice cream dish is empty.
Continuity mistake: When the bad guy is taking photos of Dooley and his partner, there is one where the ticket is still in the window even though Dooley has taken the ticket off the window. (00:29:00)
Continuity mistake: As Admiral Wilson on the Pegasus base fires his weapon on the glass window that protects the Navigation A.I. it doesn't gets a scratch. In the next shot he starts to hit the glass with the rifle's stock and a large grey stain have appeared on the glass, only to have vanished next time the glass is shown.