Continuity mistake: When Van Helsing hypnotizes Mina, the candle he is holding changes throughout the scene: In the shots facing Van Helsing, long pieces of wax are sticking up from the top of the candle, while in the shots facing Mina, they're gone. (01:43:40)
Continuity mistake: When Vlad heads out into battle, he leaves through the chapel doors, which open onto a view of the sky at sunset and his army assembled outside the door. After the battle, he re-enters the chapel through the same doors, which now open into a much smaller space, terminating in a giant stone wall. (00:01:35 - 00:03:25)
Continuity mistake: When Vlad finds Elisabeta dead, the suicide letter lying on her chest keeps changing position between shots: In some shots, the letter the letter is lying almost perpendicular to her body, while in other shots it is parallel. (00:03:15)
Continuity mistake: Before the wreath of garlic falls down on Lucy's bedside table, it can be seen hanging on the lamp, but in the previous shot, as well as earlier in the scene, there was no garlic on the lamp. When Lucy grabs the vase from the bedside table a couple of shots later, the garlic that fell down on the table has mysteriously disappeared. (01:09:35)
Continuity mistake: When Keanu Reeves is being seduced by Dracula's brides, Monica Bellucci rips open his shirt, but in the previous shots, his shirt is already open. (00:33:00)
Continuity mistake: When Lucy enters the crypt, the candles on her left side ignite twice, once in the wide shot where she walks down the stairs and once in the following close-up of the candles. (01:22:40)
Continuity mistake: When Mina and Jonathan are dining with Van Helsing, the shape of the roast beef sitting on the table keeps changing throughout the scene. (01:27:50)
Continuity mistake: When Arthur sits by Lucy's bed while watching over her, as Dracula appears outside the window, there's a quick shot of the bedroom from outside, and Arthur is nowhere to be seen. In the next shot inside the room, he sitting by the bed again. (01:16:15)
Continuity mistake: When Lucy sits down with Mina when Mina is typing, the folds in the curtain on the left change after they open the book. (00:19:10)
Continuity mistake: When Mina receives the letter after Jonathan escapes, she's holding it in her hands as she begins to climb the stairs, but in the next shot, her hands are empty, best seen when Van Helsing holds her hands. (01:10:00)
Suggested correction: Mina is in two different sets. The first she is in front of a gate. Of course, she has plenty of time to put the letters away.
I have checked the scene and you are absolutely right - Mina is indeed standing at the gate in the first shot, which gives her enough time to put the letters away before walking up the stairs to see Lucy in the second shot. Sorry, my bad.
Continuity mistake: When Mina and Jonathan are dining with Van Helsing, in some shots, Mina's drinking glass is full, but in two shots facing Van Helsing, the glass can be seen in the lower right hand corner, and it is empty. (01:27:50)
Continuity mistake: When Jonathan is shaving, in the first shot, the mirror he is using is quite small and has a thin wooden frame. When Dracula grabs his shoulder, the mirror is much bigger and has a thicker frame. In the next shot, where Jonathan abruptly turns around, the smaller mirror is back. (00:26:10)
Continuity mistake: On the carriage ride to Dracula's castle, Jonathan looks out the window and sees the wheels of the carriage. In the next shot, the wheels are covered by a sheet of fabric. (00:11:40)
Continuity mistake: When Jonathan looks at Mina's picture aboard the train, and when Dracula sees her picture in his castle, her face is turned to one side. When Van Helsing hypnotizes her, there is a visual of the photo against a burning backdrop, and the picture is reversed, with Mina's face turned to the opposite side. (00:09:32 - 01:43:35)
Continuity mistake: At Lucy's dinner party, as Lucy is sitting on the couch with Jack Seward, Quincey Morris is holding his hat in his hands. When Lucy gets up from the couch to greet Arthur Holmwood, he is still holding it, but when the scene cuts back to Jack and Quincey a few seconds later, Jack gets a funny look on his face and then magically pulls Quincey's crumpled hat out from under his butt. (00:22:25)
Continuity mistake: When Dracula stamps the paper in the castle, in the wideshot, the wax seal is several centimetres away from his signature, but in the close-up, it is right next to his name. Also, his signature differs slightly between the two shots. (00:15:05)
Continuity mistake: When Dracula stabs the cross and blood pours out of it, in one shot it is slowly creeping towards Elisabeta's dead body, in another shot it is rushing past her, and in the next shot it's slowly creeping again. (00:05:20)
Continuity mistake: When Mina and Lucy are looking at erotic illustrations in the Arabian Nights book, in the wide shots of the girls holding the book, Mina's nails are cut short, but in the close-ups of her hands on the book, her nails are longer. (00:19:21)
Continuity mistake: When Dracula bumps into Mina on the street, the newspaper he just bought is tucked under his left arm, but in the next shot, when the camera pans downward as he catches the bottle, it is gone. (00:45:45)
Continuity mistake: After Mina discovers the "Arabian Nights" book while she's typing, a chair behind her moves closer to the desk between the wideshot of her from behind, and when Lucy walks over to her. (00:18:15)