The fleet number on the bus that Amy Partlett boards changes from #3528 to #6813.
As Barbara Darling is ripping the buttons from the front of Bernard Chanticleer's shirt, she pulls off the top button first. In the next edited shot, as Barbara's hands move to the lower buttons, the top button is back on. In the next shot, the top button is missing again.
Early in the film, while Bernard is riding in the backseat of his mother's car (with his dog), the weather in the cutaway shots of pedestrians ranges from sunny and dry to raining and damp. Also, the position of the dog changes substantially between shots.
Albino therapist's skin coloring was as tanned as that of non-albino patient Barbara Darling; real albinos lack pigmentation, resulting in flesh that looks nearly white.