Re: Uppercase – Registration
BP has always used WP’s login system; we’ve never implemented are own.
WP Core has a difference in username requirements depending if you’re on multisite or not-multisite. As BP started out life as a WPMU plugin, for some reason, we ended up with their username validation logic copied into BP. I believe this was because it wasn’t possible to utilise WPMU’s directly (not sure).
In BP 1.6 (what we’re working on now), we removed the validation logic we have, so it will definitely fall back to whatever logic is present in WP Core.
