Because the problems with the Wordpress Theme Check plugin, I had to remove the post share system. To add it again, follow the steps below.

1 - Add This code to "single.php", just before the tag "<article class='entry'>":

<?php
$url = get_permalink($post->ID);
$text = str_replace('http://cleitonlima.com.br/' , 'cleitonlima.com.br/' , $url);
$tiny = get_tiny_url($text);
$title = get_the_title($post->ID);
$ustr = rawurlencode($title);
echo '<span class="selo-text">Compartilhe: </span>';
echo '<div class="selo-input"><form><input type="text" readonly="readonly" value="'.$tiny.'"/></form></div>';
echo '<div class="selo-share"><a href="http://identi.ca/notice/new?status_textarea=RD%20@cleitonlima%20'.$ustr.'%20'.$tiny.'" target="_blank"><img src="http://espacoliberdade.blog.br/blog/wp-content/themes/akangatu/imagens/social/identica.png" alt="identi.ca share"/></a>';
echo '<a href="http://twitter.com/home?status=RT%20@cleiton_flima%20'.$ustr.'%20'.$tiny.'" target="_blank"><img src="http://espacoliberdade.blog.br/blog/wp-content/themes/akangatu/imagens/social/twitter.png" alt="Twitter share"/></a>';
echo '<a href="http://www.facebook.com/sharer.php?u=@cleiton_flima%20'.$ustr.'%20'.$tiny.'" target="_blank"><img src="http://espacoliberdade.blog.br/blog/wp-content/themes/akangatu/imagens/social/facebook.png" alt="Facebook share"/></a></div>';
?>

2 - Add this code to your "function.php":

<?php function get_tiny_url($url) {  
     $tiny = file_get_contents("http://va.mu/api/create/?url=$url");  
     return $tiny;  
}
?>

Done. You now have the post share system.