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by Tecuane 2501 days ago
Passwords for Blizzard accounts are also case-insensitive, as they are converted to upper case before hashing. Try it!

I first found this while working on a WoW server emulator in around 2009, but I believe it's been the case since Battle.net 1.0 was launched in 1996. In order to preserve backwards compatibility, it's never been changed.