Password Protect a Post Error on Apple Safari

Hi there,

Rather strange problem. Only on Apple Safari, all the other browsers (IE, FireFox, Chrome) we are unable to successfully enter a password into a password protected post and be taken to the page. After you enter the proper password it just takes you back to the password protected screen. Any thoughts on why this would happen?

http://www.jumpwithjill.com/events

Thanks and regards,

Adrian