[jimsmart]

Ah, my bad: In the post I was replying to, I thought you were saying that all of the permutation were enumerated and tested for — which we can all agree is terrible.

I now understand you mean that the directory is in fact scanned (and filenames compared in a case insensitive manner) once a miss occurs. Which is what I was hinting at.

Apologies, I misunderstood your post — and my reply could have been clearer also.