Custom Post Type Rewrite Rule

My theme uses the following code which produces this slug:

'rewrite' => array('slug' => $this->safe_name . '-detail'),

[B]http://www.domain.com/estate-detail/4-bedroom-property-for-sale/[/B]

I need to get rid of the ‘estate-detail’ part so I changed the rule to just:

'rewrite' => array('slug' => ' '),

This produces the slug as:
[B]http://www.domain.com//4-bedroom-property-for-sale/[/B]

How do i get rid of the double forward slash?

many thanks
Andy

See if this helps:

http://vip.wordpress.com/documentation/remove-the-slug-from-your-custom-post-type-permalinks/

thanks that actually helps !