+1
BladeRunner is one of my favorite movies in the history of cinema, and it is chock full of continuity errors - large and small. As another example, Stanley Kubrick, as careful and controlling a filmmaker as he was, has dozens of such "mistakes" in his works. Doesn't bother me in the slightest.
Basically I go with the theory that if you're noticing what angle a character's tie is at or how long their cigarette is from cut to cut during a scene, espcially on the first viewing or two, you can't be very involved in the story or filmmaking. In a bad movie where I'm bored anyway, I'm much more likey to notice these sorts of "errors" straight off. But in a good to great film, it doesn't really make much of a difference, and I only spot them on my tenth or thirtieth or hundredth viewing. If I'm watching a movie that much and that closely and still enjoying it, such details are truly trivial.
I think the first one I ever spotted by myself when I was eleven or twelve or whatever is in Stripes, which I saw in the theater and then probably fifty times on cable television. Never spotted it in the cinema, but by the time it hit television I noticed in the scene where John (Bill Murray) tries to go AWOL and Russell (Harold Ramis) tackles him to stop him, from one angle there's a duffel bag near Murray's head. From the other angle, no bag at all. Didn't notice it straight off, but even if I had it really makes no difference in how enjoyable and funny a movie it is.
I dunno. They're good for movie trivia geeks like us, but I don't find them to be a problem at all. Errors in internal logic in the plotting that are simply lazy and make easy outs when the film has written itself into a corner, those bother me. How much food is on the plate during a scene, I don't really care.
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"Film is a disease. When it infects your bloodstream it takes over as the number one hormone. It bosses the enzymes, directs the pineal gland, plays Iago to your psyche. As with heroin, the antidote to Film is more Film." - Frank Capra