Thread:Project:Support desk/All images with diacritics in name disappeared after some update/reply (3)

Actually, the problem is not in MediaWiki or Windows, it's in PHP's lack of proper Unicode support - you will have the same problem on Unix systems that don't assume file APIs to be UTF-8 (luckily, recent mainstream Linux does assume so). But in any case - yes, Linux is much better for MediaWiki.