Ever-helpful error messages
I don’t know what happened, but one of my applications crashed and before it died, it gave me these helpful error messages:


How thoughtful of the developers to give me a preemptive notification that something was about to go wrong, giving me no options to resolve the problem. One has to wonder what the point of the first error message is. Not that the second one is all that helpful either (unless you happen to be a developer), but at least it tells you something “unusual” happened.
The lesson? Skip the preemptive notification and avoid programmer-speak in error messages. (Hint: the words “C++” and “Runtime” should not be included.)
