note 102600 added to function.ucwords

I found a problem with ucwords function.

$nome = 'RITA DE CÁSSIA';
$nome = ucwords(strtolower($nome)); 

// RETURNS: Rita de CÁssia

// the returns should be: Rita de Cássia

Anybody can help ?

Thanks!
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Manual Page -- http://www.php.net/manual/en/function.ucwords.php
Edit        -- https://master.php.net/note/edit/102600
Del: integrated  -- https://master.php.net/note/delete/102600/integrated
Del: useless     -- https://master.php.net/note/delete/102600/useless
Del: bad code    -- https://master.php.net/note/delete/102600/bad+code
Del: spam        -- https://master.php.net/note/delete/102600/spam
Del: non-english -- https://master.php.net/note/delete/102600/non-english
Del: in docs     -- https://master.php.net/note/delete/102600/in+docs
Del: other reasons-- https://master.php.net/note/delete/102600
Reject      -- https://master.php.net/note/reject/102600
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