Look at the block of code added to /YOUR_ADMIN/includes/header.php, starting at line 211:
Code:
//-bof-lat9 Display last password change and login
  if (function_exists('zen_get_admin_name') && function_exists('zen_read_user')) {
    $adminInfo = zen_read_user(zen_get_admin_name($_SESSION['admin_id']));
?>
  </tr>
  <tr>
    <td align="right" class="main" valign="top"><?php echo TEXT_PASSWORD_LAST_CHANGE . $adminInfo['pwd_last_change_date']; ?></td>
  </tr>
  <tr>
    <td align="right" class="main" valign="top"><?php echo TEXT_LAST_LOGIN_INFO . $_SESSION['last_login_date'] . ' [' . $_SESSION['last_login_ip'] . ']'; ?></td>
<?php
  }
//-eof-lat9
and change that to
Code:
//-bof-lat9 Display last password change and login
  if (function_exists('zen_get_admin_name') && function_exists('zen_read_user')) {
    $adminInfo = zen_read_user(zen_get_admin_name($_SESSION['admin_id']));
?>
  </tr>
  <tr>
    <td align="right" class="main" valign="top"><?php echo TEXT_PASSWORD_LAST_CHANGE . substr($adminInfo['pwd_last_change_date'], 0, 10) . ' @ ' . substr($adminInfo['pwd_last_change_date'], 11, 5); ?></td>
  </tr>
  <tr>
    <td align="right" class="main" valign="top"><?php echo TEXT_LAST_LOGIN_INFO . $_SESSION['last_login_date'] . ' [' . $_SESSION['last_login_ip'] . ']'; ?></td>
<?php
  }
//-eof-lat9