A customer contacts me and says 'I have an error'. After several emails I manage to get them to send me a screenshot of the error. The error message describes the exact problem and what to do about in one short sentence. I type pretty much exactly the error message text into my reply. This solves their problem. I think they see 'error' or 'warning' and they don't even read the rest of the sentence. Extraordinary. But it has happened more than once.