Change label max length on all field types The default max length for all labels of all field types is 128. The db can handle 255. So no schema change. How can I change the default max length to 250?
You can create a module and include the hook_form_alter for the content types you want. This is an example of how to do that:

function [MODULE_NAME]_form_alter(&amp;$form, $form_state, $form_id) {
  if($form_id == 'your_form_id'){
    $form['your_field_name']['label']['#maxlength'] = 255;
  }
}


Also you can try this module: http://drupal.org/project/remove_field_label_length_limit