My most common support "Problem"

I've had a common theme with customers of recent. In short, they tell me they have this really terible thing happening and they know the end result, but they have not a clue as how to make it happen. So, although you've never heard of this problem before, could you fix it right away? It seems to be happening more and more. I have one case in particular where the case was created created in January, yet I've yet to be told how to reproduce the problem. There has been a lot interaction with the customer, but che ontinues to not be able to provide a test case.

I find this a disturbing trend.