I don't know if here is the right place to post it, but...
On Admin.portuguese_brazilian.php, at line 300:
$txt['support_versions_db'] = '%$1s versão';
This should be:
$txt['support_versions_db'] = '%1$s versão';
This typo causes 2 sprintf errors on Error Logs (Admin.php line 533 and Subs-Admin.php line 79)