character set

Hello. great job! tx a lot for the plugin.
I`m having a problem with the character set when pulling data from the data base ( i use uft8 / latin1) and i use lots of ? and ~(portuguese language).
So, when i make the query, i got strange characters like
INSTALA<strong>\u00c7\u00c3O</strong> instead of INTALA<strong>??O</strong>
I`ve tried to use
SET NAMES latin1,
at the beginning of the query, but it didnt work.

Can u help me with that, please?
PS: the wordpress site works pretty well with the characterset…. no problems so far.
My query is as follow:

SELECT
 wp_posts.post_title AS 'Ocorrência',

  GROUP_CONCAT(if(meta_key = 'ocorrencia_descricao', meta_value, NULL)) AS 'Descri??o',
  GROUP_CONCAT(if(meta_key = 'ocorrencia_analise', meta_value, NULL)) AS 'Análise',
  GROUP_CONCAT(if(meta_key = 'ocorrencias_recomendacoes_de_seguranca', meta_value, NULL)) AS 'Rec. de Seguran?a',
  GROUP_CONCAT(if(meta_key = 'ocorrencia_responsavel_pelo_relatorio', meta_value, NULL)) AS 'Responsável',
  GROUP_CONCAT(if(meta_key = 'ocorrencias_prazo', meta_value, NULL)) AS 'Prazo',
  GROUP_CONCAT(if(meta_key = 'ocorrencias_status', meta_value, NULL)) AS 'Status'
FROM wp_postmeta
    left JOIN wp_posts
        ON wp_postmeta.post_id = wp_posts.ID
    left JOIN wp_users
       ON wp_posts.post_author = wp_users.ID
where wp_posts.post_type = 'ocorrencia' AND wp_posts.post_title LIKE '%TWR%'
GROUP BY post_id
order by wp_posts.post_title
 ;

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