>> how much market share will that OS get when users discover they not only have > to remember file names, but the exact case of a file name
>
>In my experience, they cope just fine.
>
>Anyone who is going to type filenames anyway, has no problem. Those who would have problems always point and click.
>
>Also, case is not the only thing that confuses 'less astute' users. They also can't distinguish between - and _, don't understand that "my file" is different to "myfile" and so forth.

Since I just love good thread drifts... I had users who'd type a colon as .. (because it's name in Serbian is "dvotačka" - a twopoint). Or those who'd enter the name of something surrounded by two apostrophes, and then search for it under quotation mark.