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: The pipe on the starboard side of the forward smokestack changes by the time the ship sinks. When Captain Smith tells Murdoch to speed up the ship it bends at the top and creates a half circle. When it is collapsing behind Cal, it has the shape of a "P." (00:28:20 - 02:28:00)
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: When Rose is lying on the piece of board and she is trying to wake Jack by shaking his hands and such, there is some frozen stuff under Jacks nose. The scene cuts back to Rose and when we go back to Jack the ice isn't there. Then the scene cuts back to Rose and the next time we see Jack he has it on his face again. (02:48:35)
Revealing mistake: During one side shot of the ship sinking at night, the bow has clearly begun to slide under. There are several lines hanging off the side of the boat. The lines are perpendicular to the boat, not the water, indicating that the model was filmed when level and tilted digitally. (02:02:25)
Continuity mistake: At the part when Jack or Rose (I can't tell which) wipes their hand on the fogged up window, they show it again in the next shot and you can definitely tell it's a completely different handprint. (01:32:00)
Continuity mistake: Right after the lights go out there is a structure directly aft of where the ship will break that on both sides of an angled roof have four panels, each with four portholes (a skylight). After the ship has broken apart and the smokestacks are falling off, it is now open. (02:40:55 - 02:41:50)
Continuity mistake: When Hockley and Lovejoy find the drawing of Rose in the safe, Hockley is holding the drawing which has been secured in some kind of brown manila folder. A split second later, Hockley reads the note Rose left while still holding the drawing (and even angrily squishing it slightly with his hand), and it is not in a manila folder. (01:32:40)
Continuity mistake: When Rose enters the cabin where Jack is handcuffed, the pillow on the berth behind appears/disappears between shots. The black jacket on the desk and items on the shelf also disappear. (01:55:40)
Continuity mistake: When Jack is asking Rose to dance after dancing with the little girl "Cora", you will notice that Jack's hair is down when first asking her and when the camera goes to Rose and then back to Jack that it is back up with, all nice and neat. (01:04:35)
Continuity mistake: When Jack is howling at the front of the ship, he puts his arms up. His left arm is behind the rope, but in the next shot of him, his arm is in front of it. In the next shot, it is behind again. (00:31:40)
Continuity mistake: When Rose has just boarded titanic and is looking through her "finger" paintings, she is holding a painting, then slides it down her fingers. When she slides it down, she slides it almost to the end of the painting's frame, but in the following shot she isn't even close to the edge/end of the painting. (00:27:45)
Continuity mistake: When Rose attempts suicide she is holding onto the railing while standing on the outside. In some shots the black lace from her dress is held under her left hand, in some it isn't. (00:37:40)
Continuity mistake: The length of Rose's fingernails changes noticeably throughout the film. In some scenes, her nails are very short (during the "flying" scene), and in other scenes her nails are a lot longer (when she takes the comb out of her hair right before Jack sketches her). (01:18:40 - 01:21:20)
Continuity mistake: At the beginning when Jack and Fabrizio go to the front of the ship, you can see the anchor section at the front, yet when Jack is waiting for Rose, the camera pans up, and its a completely different design, than from the first look at the beginning. (00:30:10 - 01:17:10)
Continuity mistake: When the old Rose arrives on the Keldish, she is unloaded from the helicopter sitting in her wheelchair. The two pilots are helping from above, but afterwards they disappear inside the helicopter from one shot to the next, which is too fast as the rotor noise suggests continuity. (00:14:20)
Continuity mistake: In the scene where Jack and Rose are on the third class level partying with the other people in third class. When Jack hands Rose a glass of beer, how she holds the glass differs between shots. (01:06:20)
Continuity mistake: During the first meal on the Titanic (the one where Cal plucks Rose's cigarette from the holder) the stone on Rose's necklace changes between almost disappearing in her dress and about two inches above. (00:33:10)
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)
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)
Chosen answer: Because she is considered, in a minor sense, a "villain" in this film for forcing her daughter into a loveless arranged marriage to satisfy her personal wants, most fans probably speculate that she became a poor and penniless seamstress and lived out her life working in a factory. Of course, this is possible, without the financial security of the arranged marriage between Cal and Rose. However, it is difficult to believe that a woman of such status, and who has so many wealthy and powerful friends, would be allowed to languish in abject poverty doing menial labors. I would tend to believe that she probably sold a number of her possessions for money (she did mention that as part of the humiliation she would face if Rose were to refuse Cal's affections), and probably lived off the kindness of others. Given that her daughter was betrothed to a Hockley, his family might have felt an obligation to assist her in finding a suitable living arrangement and a situation for employment. It is also possible that she re-married into wealth. However, this is more unlikely, mainly because back in 1912, it was considered scandalous to re-marry, especially at Ruth's age. However, since Ruth does not make an appearance after surviving the sinking of the Titanic in a lifeboat number 6 (next to Molly Brown), nor is she mentioned again, her fate is left unknown and subject only to speculation.
Michael Albert
In that era, with Rose betrothed to Call, Cal would most definitely have provided for Ruth in the lifestyle she was accustomed to. As Cal angrily raged at Rose the morning after her excursion below decks, "You are my wife in custom if not yet in practice ", thus, society would have viewed him a villain had he not cared for Ruth once it was assumed Rose was dead.