[wp-trac] [WordPress Trac] #13162: Username sanitization silently remove diacritic & such

[WordPress Trac]

#13162: Username sanitization silently remove diacritic & such
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 Reporter:  Jbb           |       Owner:             
     Type:  defect (bug)  |      Status:  new        
 Priority:  normal        |   Milestone:  3.0        
Component:  General       |     Version:             
 Severity:  critical      |    Keywords:  needs-patch
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 As per #13159

 Manually adding user (backend User->Add new) allow for any username (for
 example, '''Dédé''') without any error. But WP silently sanitize the
 username ('''Dd''' in my example), so the admin has no idea something went
 wrong.

 Also, Self registration indicate a “Invalid username” error, without any
 more explanation. Some textual explanation about what's ok and what not
 might be helpful.

 See r14264 & r14265 for consistency.

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Ticket URL: <http://core.trac.wordpress.org/ticket/13162>
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