I asked a question regarding joining 2 avi files using a GUI, and someone else earlier asked how to do that, but using the CLI. Another not-so-careful user decided to vote to close, and I suspect that this person didn't actually read each question well enough, so she thought that it was an exact duplicate. If such a person would have left a Comment, I could have pointed that out.
sidenote: I would have preferred it if the original Question didn't restrict the Answer to CLI to avoid this sort of thing.