I recently asked this question Why is my system suddenly not allowing upper case letters?, but I changed a lot when I figured out part of the problem, however someone had already given an answer which would have potentially helped me if the problem had been what I originally thought it was (which it turned out not to be), but now the answer is irrelevant and isn't really related to the question, though its author refuses to delete it on the grounds that "it may help someone".
So I ask the question, should it be deleted? It may help someone in future, but someone with a different problem to mine.