First, add the following line to your config.php file under the <?php line:
PHP Code:
define('SKIP_ALL_ERRORS', true);
Then, create a new style with no parent:
- Styles & Templates > Style Manager > Add New Style
- Parent Style: No Parent Style
- Title: Default vBulletin
- Allow User Selection: Yes
- Save
Then browse the site using that totally default vbulletin style - do you still have the same problem?