Upload File Bug

[eluser]gscharlemann[/eluser]
I've tried several different approaches with this, both rewriting the is_allowed_filetype() function as shown above and

Code:

// example
// $_FILES['userfile']['name'] = 'H010101.JPEG'
$config['allowed_types']  = 'jpg|jpeg|gif|pdf';

// the fix code
$tmp_ext = strtolower(substr($_FILES['userfile']['name'], strrpos($_FILES['userfile']['name'], '.')+1));
$config['allowed_types'] = substr($config['allowed_types'], strpos($config['allowed_types'], $tmp_ext), strlen($tmp_ext));

// result: $config['allowed_types'] = 'jpeg'

$this->load->library('upload', $config);
if ( ! $this->upload->do_upload($file_id))...

Both seem to work in IE and Safari, but Firefox throws the "The filetype you are attempting to upload is not allowed." error. Is anyone else experiencing this?