[arghwhat]

In a world of ASCII, maybe. But fixing one problem for a small group of people is a giant can of worms for the rest of the world. Normalization of compound characters, exotic character sets, emoji, different classes of upper/lower-case letters, normalization of compound what-not.

And even then it still doesn't fix the issue outside of the world of ASCII. A filename written in hiragana and katakana is logically the same to the end-user, but they are still distinct. Simplified and traditional Chinese, Hangul and romaja, pinyin, devanagari, thai, and the list goes on.

Case-insensitive filenames fixes nothing, but breaks everything. There is only one sensible thing to do with arbitrary user-input, and that is to leave it be.

[tuatoru]

> There is only one sensible thing to do with arbitrary user-input, and that is to leave it be.

I wish programmers would believe this about names and addresses! My wife has a two-word first name, and I have a two-word family name.