for any of you who have the otterbox defender for the iphone, the one that does a pathetic job of holding the case in the holster, if you go on otterbox's website and fill out the "Contact Us" form (link below) and let them know your phone won't stay in the holster, they will send you a new one at no charge.
http://www.otterbox.com/contact-us/
http://www.otterbox.com/contact-us/