Continuity mistake: At the very end when the Nicklebys are confronting their Uncle Ralph, at one point Ralph slumps down over his desk. He's off screen and you hear the thud of him falling, but the eyelines of the people on-screen don't change a bit; they continue looking slightly upward. You'd think if he was falling over they'd follow him down with their eyes and they'd move at least a little.
Continuity mistake: When Smike and Nicholas are with the theater company the man who is the savage is just about to perform the highland fling Mr. Crummell comes up and stops him. The man who is the savage in the play grabs the flams then in the next shot they show him grabbing it again.
Visible crew/equipment: When Uncle Ralph Nickleby receives proof that his nephew was correct about the money, as the camera pans through a glass case with two large birds (Cranes or Herrings), the face of a camera crewmember is reflected. The face is clear and defined, no need to slow motion to pick it up. (To see more as the camera pans, watch the white lantern on the desk. The face is to the right and moving to overlay before passing the glass case.)