Pagnation com dados GET no uri - Codeigniter

Estou tentando paginar resultados retornados pelo banco de dados. Mas quando tento obter o deslocamento do URI:

questions/search?content=foobar/4

/4 deve ser o deslocamento, mas é atribuído ao$_GET valor.

Este é o método todo no controlador:

http://pastebin.com/QFJddMDJ

<code>$results = $this->question->search_results_count($content);
$this->load->library('pagination');
$config['total_rows'] = count($results);
$offset = $this->uri->segment(3);
if ($offset == false) $offset = 0;
$config['full_tag_open'] = '<ul class="pages">';
$config['full_tag_close'] = '</ul>';
$config['num_tag_open'] = '<li>';
$config['num_tag_close'] = '</li>';
$config['cur_tag_open'] = '<li><a  class="active">';
$config['cur_tag_close'] = '</a></li>';
$config['prev_tag_open'] = '<li class="prev">';
$config['prev_tag_close'] = '<li>';
$config['next_tag_open'] = '<li class="next">';
$config['next_tag_close'] = '</li>';
$config['num_tag_open'] = '<li>';
$config['num_tag_close'] = '</li>';
$config['first_link'] = '<<';
$config['first_tag_open'] = '<li>';
$config['first_tag_close'] = '</li>';
$config['last_link'] = '>>';
$config['last_tag_open'] = '<li>';
$config['last_tag_close'] = '</li>';
$config['per_page'] = 1;
$config['uri_segment'] = 2;
$config['page_query_string'] = TRUE;
$config['use_page_numbers'] = TRUE;
$config['suffix'] = '?content='.$content;
$config['base_url'] = base_url().'questions/search/';
$this->pagination->initialize($config);
</code>

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