They always were - that's why they get replaced with %20 in error messages, because the network file system can't handle them otherwise.
It's just that windows has an override to allow such letters that are illegal under networking rules, but that override has problems of its own.
It's just that windows has an override to allow such letters that are illegal under networking rules, but that override has problems of its own.
But I don't have spaces. Do underscores cause problems now too?