Corrected entry: According to the timeline of the film, Batty and his replicant associates escape from off-world, then come to Earth. After they try to break into Tyrell Corp. and fail, the police decide to VK new employees at Tyrell to see if the replicants are trying to infiltrate that way (which they are, via Leon). This doesn't make any sense - the Tyrell corporation MADE Leon. The second he walked in the door to apply for a job, he'd be recognised. Even if he wasn't, once the Tyrell Corp. knows it has a problem, they could just compare photos of all the new employees to their file footage of Leon (which Bryant shows to Deckard in the beginning).
Corrected entry: When Deckard is scanning the picture, he sees a woman with a snake tattoed on her left cheek; then he makes a hardcopy of the picture. A few scenes later , supposedly, he finds that woman (the snake woman) but you see she has no tattoo at all on her face. After she takes a shower and dries her hair, the tattoo is in place again.
Corrected entry: In the scene where the female replicant is shot and goes through the windows her shoes change from high heels to flat from shot to shot.
Corrected entry: When Deckard hassles Hassan the snake dealer for information, he asks who bought the snake of the scale he was presenting. Hassan tells him it was Daffy Lewis in the 1st sector. When Deckard is at Daffy's bar and calls Rachel, he tells her that he is at Daffy Lewis' place down in the 4th sector.
Corrected entry: The original scene where Leon is being interrogated is different to the recording of the scene that Deckard watches as he is driving. Even what Leon says is different, in the original scene I think he says "Let me tell you about my mother" but in the recorded playback he says "I'll tell you about my mother".
Corrected entry: Replicants are shown to be able to tolerate without discomfort freezing cold that is fatal to humans, and can push their heads through brick walls, a trick that would crush a human skull. Deckard hits Batty with a steel pole in the belly and he hardly even flinches. These replicants are supermen. Why do they need the Voigt-Kampf test to detect a creature that, at a minimum, has a tungsten steel skull and super-efficient thermal insulation for skin? Any kind of x-ray or tissue sample would give them away.
Corrected entry: When we see Baty for the first time as he looks up and over to the left, you can see the finger of a crew member tapping on his coat.
Corrected entry: Deckard buys a bottle of booze and then runs into Leon in the street. In this scene the bottle is nowhere to be seen. Later, after the fight, he has it again. Where did it go? This happens becasue this fight scene originally came before the previous fight with the dancer and the scene where he buys the drink. That is why Deckard has the marks on his face from the Leon fight before the fight takes place.