[buddypress-trac] [BuddyPress] #5175: Multisite: Trying to register with capital letters is not possible. Error message doesn't reflect this.

[buddypress-trac]

#5175: Multisite: Trying to register with capital letters is not possible.  Error
message doesn't reflect this.
--------------------------+-------------------
 Reporter:  r-a-y         |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  1.9
Component:  Members       |    Version:  1.2.4
 Severity:  normal        |   Keywords:
--------------------------+-------------------
 In multisite, trying to register with capital letters will throw the
 following generic error.

 {{{
 Usernames can contain only letters, numbers, ., -, *, and @
 }}}

 Why?  Because WP multisite explicitly filters `sanitize_user()` to
 lowercase characters in `wp-includes/ms-default-filters.php`:


 {{{
 add_action( 'sanitize_user', 'strtolower' );
 }}}

 This is a UX bug.

 Rather than remove this filter, we should probably patch up our user
 validation function to check for multisite and check for capital letters.
 If so, throw up a new error.

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Ticket URL: <https://buddypress.trac.wordpress.org/ticket/5175>
BuddyPress <http://buddypress.org/>
BuddyPress