As to whether or not the case-equivalence of "ss" and "Ã" should be expressed (a) only in Germany,
Don't forget 150 years old Swedish computers! â
I don't think it would make a great deal of sense to enforce it only in Germany, however. If you did that, then a directory tree FTPed from England to Germany might be unsaveable at the German end, so I'd argue that the default case mappings should be the ones used everywhere.
That is already the case when FTPing something between different OSs that have different rules for file names.
Stefan
