Continuity mistake: After Rose breaks Jack's handcuffs they join some sailors to ram down a gate. A frame later, from the opposite angle, the gate's position is totally different. (02:03:10)
Continuity mistake: Rose walks through the chest-deep water with the axe, holding it vertically when seen from behind and horizontally when seen from the front. (02:03:25)
Revealing mistake: When Tommy, Jack and Rose are trapped down the staircase with a lot of other people, during the shot where Fabrizio is running towards Jack, look on the right portion of the screen. You can see a kid with a hat on, being carried around by his mother, who deliberately grins at the camera. (02:03:40)
Continuity mistake: When Tommy begs the steward to open the gate he is reaching with his right arm through the gate, holding on to a bar. When the camera angle changes the arm is hanging down. (02:04:05)
Continuity mistake: When Tommy Ryan, one of Jack's ship friends, is trying to get to the top deck, but is stopped by metal guard rails, at the beginning of the scene he has his right hand on the rail, then in the next shot he has his left hand on the rail. (02:04:05)
Factual error: When Jack, and Rose were trying to escape the rising water they were trapped by a locked gate. Jack and the crowd pulled up a bolted down bench to use as a battering ram. When they pulled the bench loose they showed a close up of the wooden floor shattering. The wood was pressed fiber board which would never be used as ship decking, not to mention, pressed fiber board wasn't invented until decades later. (02:06:05)
Continuity mistake: When the musicians go out on deck to play as the ship is sinking all they have on is their uniforms. They are seen this way a few times, in the last shot of them they all have on overcoats. (02:06:30 - 02:22:30)
Audio problem: When the leader of the orchestra suggest to play "Orpheus", the music starts later than the musicians actually begin playing their instruments. (02:07:00)
Factual error: Those USA $20 bills that Caledon Hockley stuffs into the pocket of First Officer Murdoch are Federal Reserve Notes, which were first issued in 1914, two years after the Titanic sank. (02:07:20)
Factual error: When Rose, Jack and his friends come up to the boat deck while the ship is sinking, they ascend using the second class staircase and its exit on the deck. When Jack lets go of the door it is able to hit the side of the deckhouse. On the actual Titanic there were walls on the bow side of each door, which supported an overhang above the entrance. This is not included in many scenes in the movie. (02:08:05)
Revealing mistake: This mistake, as far as I know, can only be seen in widescreen. After Rose, Jack, Tommy and Fabrizio have run on deck (after breaking the gate down), the camera looks down the ship toward the bow. If you look at this carefully, you can see city lights in the top-left hand corner of the picture. I know these are city lights because in a book about the movie, it shows a similar picture. Fixed on Blu-ray. (02:08:05)
Continuity mistake: In the "You jump, I jump" scene with Jack and Cal persuading Rose to get on a lifeboat, Rose embarks the lifeboat at the front, port(left side) side of deck top. Yet when Rose jumps back on the ship, she climbs back on in the middle, starboard(right side) of A deck where the windows change, running towards the bow to the Grand Staircase; while Jack is running towards the Stern from the Port front side of deck top. Jack enters the Grand Staircase from the port side of Deck top, and Rose enters the Grand Staircase from the port side of A Deck. (02:11:40)
Continuity mistake: When Rose is being lowered into the lifeboat, she looks up at the ropes, and then the camera alternates between her and Jack/Cal four times. The shots are only a few seconds apart. In the first shot, Cal's hands don't extend past the rail and Jack's are clasped resting on the rail. In the second shot, Cal's hands now extend over the rail and Jack's are completely gone. (The third shot doesn't show the rail.) In the fourth shot, Cal's hands again don't extend over the rail and Jack's are holding the rail. Jack and Cal are calm throughout, so would likely not have been moving their hands about. (02:12:40)
Continuity mistake: After Rose has been persuaded to step into the lifeboat the camera is on Cal and Jack for quite some time when Cal reveals to Jack that there is no arrangement in his benefit. During all this time the lifeboat is being lowered, but when the camera cuts back to Rose she can still make eye contact with Jack almost at level. (02:12:50)
Other mistake: Several actors/props/areas etc. are well known in this area to be flipped. For example, Billy Zane, who plays "Cal" in this film is right-handed, yet in some areas he uses his left-hand when it's not dominating and natural. (Noticeably, when he is chasing Jack Dawson down the grand stairs, he is holding his gun in his left hand, when it would make more sense to hold his gun in his right hand.) (02:13:00)
Continuity mistake: When Jack and Rose are running through the dining room, both of them are completely dry and running up. After Cal tells Lovejoy he'll give him the diamond if he gets it back, we cut back to Jack and Rose and both of them are soaking wet, most noticeably Jack. (02:13:15)
Continuity mistake: When Jack and Cal finally convince Rose to get on the lifeboat, Jack's hair is very scruffy with slight curls at the tips. When Rose jumps back on the ship, and Jack runs back inside to meet Rose again, his hair is perfectly straight and very well conditioned. (02:13:50)
Continuity mistake: When Cal is trying to kill Rose and Jack, then suddenly realises his diamond is in the coat, his fringe swaps from messy to perfect from frame to frame. (02:13:50)
Revealing mistake: When Cal shoots at Rose and Jack he hits a decorative wooden structure on top of a banister. When the piece falls apart you can see that it has been neatly cut in the middle, and you also see the explosive device that blew it apart. (02:14:40)
Continuity mistake: When Jack and Rose are being carried towards the locked gate by the water, we see the water and Rose hit the gate in the first long shot and then the camera changes to a close angle of the gate and Rose and the water have not reached the gate yet. (02:15:30)
