[macc]

Solutions:
If you have root access to your server and are able to modify your php.ini file, you can change the following values:
Make this:

suhosin.post.max_vars = 2048
suhosin.request.max_vars = 2048

If you do not have access to edit the php.ini file on your server, you can upload a .htaccess file to your {vBulletin}/admincp folder with the following code:
Make this:

php_value suhosin.request.max_vars 2048
php_value suhosin.post.max_vars 2048

If neither of the above options work then you will need to contact your host and ask them to change the values at the root level.

Edit: maybe you will get "500 error" - but best is to contact your host!

hope that helps

reg

macc