Length of admin comment

128 char is short for admin comment

function guestbook_form_comment_form($uid, $entry) {
$form = array();
$form['comment'] = array(
'#type' => 'textfield',
'#default_value' => check_plain($entry['comment']),
'#size' => 64,
'#maxlength' => 1000);
$form['submit'] = array(
'#type' => 'submit',
'#value' => t('Comment'));
$form['entry_id'] = array('#type' => 'value', '#value' => $entry['id']);
$form['uid'] = array('#type' => 'value', '#value' => $uid);
return $form;
}