Names starting with letters with accents, like É (eg Édith Piaf) go to the end of all items starting with that letter in MC. Édith Piaf is listed at the end of all names starting with E, just before F.
Afaik, in English, modified letters (such as those with diacritics) are treated the same as the base letter for alphabetical ordering purposes, so Édith Piaf should have been listed among other artists starting with E, irrespective of the accent (before Eduardo Delgado). It would be the same in French.
JRiverMC seems to have felt safer by treating all modified letters with diacritics as separate letters and collating them after their unaccented counterparts. This may be because there are different extra letters in different languages and thereby different conventions for alphabetical order.
I think this treatment of modified letters by the windows version of MC is fine. What do you think?