Stop Advanced Forum cutting off the username?
It seems Drupal core truncates the username to 25 characters. I have not tried this but this seems to be the solution for Drupal 7 (code added below for reference).

function MYTHEME_preprocess_username(&amp;$vars) {

  // Update the username so it's the full name of the user.
  $account = $vars['account'];

  // Revise the name trimming done in template_preprocess_username.
  $name = $vars['name_raw'] = format_username($account);

  // Trim the altered name as core does, but with a higher character limit.
  if (drupal_strlen($name) &gt; 25) {
    $name = drupal_substr($name, 0, 20) . '...';
  }

  // Assign the altered name to $vars['name'].
  $vars['name'] = check_plain($name);

}


Add this code in your theme's template.php file, and change MYTHEME to the machine name of your theme, and change the number 25 to something that fits your theme.