Visible crew/equipment: When Jack comes to the first class door for the first time in his tux, you can see a cameraman in the glass door just before he enters. (00:54:55)
Revealing mistake: When Rose breaks Jack's handcuffs with an axe, it is obvious that she doesn't hit the handcuffs on the pipe but Jack's hand - the handcuffs come apart by themselves. The axe also bends. (02:01:30)
Continuity mistake: Look closely at the location of Rose's beauty-mark the first time you see her at the dock. It is on the opposite side of her face during the rest of the movie. (00:21:30)
Revealing mistake: When Rose is running in the hallways trying to find help for Jack when he is hand-cuffed, she finds a man and asks him to help her free Jack. She gets frustrated with him and says "listen" then hits him. In shots before you can look at the man's hand and it already has blood on it before he touches his face. This was fixed in Blu-ray version. (01:59:05)
Continuity mistake: When Jack and Fabrizio are at the bow, the anchor well below them is black. Along with that, the foremost railing is not connected with the rest. But when Rose and Jack are there the well is white and the railing connects. Plus during the "flying" sequence the gap between the vertical bits of the railing is different in different shots of the ship. (00:30:40 - 01:17:35)
Visible crew/equipment: When Jack and Rose are running away from Cal to the first class dining room, if you look at the glass you can see a black screen, a light, and a crewman. Fixed in the Blu-ray version. (02:20:32)
Continuity mistake: When the ship is about to leave the dock, there's a lot of people saying goodbye to the ones that are going to leave the city. In the following shots, you can see Jack and his friends playing cards inside the pub. If you look through the window you won't see anyone. In the next shot, when Jack leaves the pub, the crowd is there again. (00:23:15 - 00:25:05)
Continuity mistake: Right before dinner, Jack and Rose are talking to the Astors, and Molly comes up from behind them, asking Jack to escort her to dinner as well. In the next shot, when Cal calls back to Rose, Molly is still walking up to them. (00:58:15)
Visible crew/equipment: As Jack is getting ready to draw, when Rose comes out you can see a hand opening the door for her. (01:21:40)
Revealing mistake: Many scenes used computer graphics to show the length of the ship. Passengers were also added walking on deck. The shadows for the passengers don't always match. (00:30:25)
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: About half an hour in when the rear of Titanic is shown, look at the very rear of the ship and you will see a red sign (near the triple screws) to the right of an over-hanging light. Shortly afterwards when Rose approaches the rear of the ship to jump off, the sign has now moved to the other side of the light. (00:31:50 - 00:36:15)
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.