Beyond that, are what/why you are sorting... should File1.foo come before File005.foo or file020.foo? I've honestly thought about creating my own file manager just to case-insensitively sort files where sequences of numbers are padded to the same length, and only if there's an identical match is case-sensitivity put lower first, then upper on first original difference.

My worry is that it would perform badly on really large directories... That said, for where it's a pain, it would be helpful to say the least.