[cono1717]

There are a couple of ways to resolve the issue first you can check to see if it is a faulty plugin on your board.

Originally Posted by Lynne

What do you have set at vboptions > style & language > use dhtml popup menus?

Try disabling your plugins and see if you still have this problem.
Note: To temporarily disable the plugin system, edit config.php and add this line right under <?php

PHP Code:

define('DISABLE_HOOKS', true); 


If that doesn't work try installing vBulletin on a local server (download WAMP server) this will allow you to quickly upload and install vBulletin as it is on your own computer, then see if the issues happen there.

You could also send us a link to your board so that we can see if it is your browser or your board.