[mreiland]

I misunderstood you, I thought you were implying customers needed to use their brain, but looking closer you did say keyboard and mouse and not keyboard and chair :)

I personally see it all the time, but I interact directly with my customers and it's always possible I'm terrible at communication. They'll say things like "X doesn't work on page Y", and It'll end up being a problem with a single link they clicked on because the data for it is such that it causes a problem (that sort of thing).

They don't know that's the issue either, you have to work with them on it.