set_flashdata problem

[eluser]PéturV[/eluser]
Hi, i´ve got a strange problem that I can´t seem to figure out.

So I got this form and if there are any validation errors I redirect back to the form and set the $_POST into flashdata aswell as the error messages.

But if there is much data in the $_POST then the error messages don´t get added to the flashdata.

So basicly my question is... is there a buffer size on the flashdata ?

Code:

function add_process()
    {
        $results = $this->events_model->addEvent();

        if($results->status != 'success')
        {
            $this->session->set_flashdata('addEventPost',$_POST);
            
            foreach($results->errors as $error)
            {
                $this->addErrorMessage("Villa",$error);
            }

            redirect("events/add/location/".$this->input->post('locationID'));
        }
        else
        {
            $this->addInfoMessage("OK",$results->message);
            redirect("overview");
        }        
    }

If your wondering what addErrorMessage does.

Code:

function addErrorMessage($title, $content = '')
{
    $this->messages[] = array( 'title' => $title, 'content' => $content, 'type' => 'error' );
    $this->session->set_flashdata( 'messages', $this->messages);  
}

Thanks in advance for any input.
Pétur