Problem with views and 9.2.0b2

[James W Greene]

Hi All,
    I am getting the following error when trying to run bind 9.2.0b2:
zone '.': wrong class for view 'external-chaos'

Revelant part of config below:
view "external-chaos" chaos { 
    recursion no; 

    zone "." { 
        type hint; 
        file "/dev/null"; 
    }; 

    zone "bind" { 
        type master; 
        file "master/db.bind"; 

        allow-query { 
            trusted; 
        }; 
        allow-transfer { 
            none; 
        }; 
    }; 
}; 

Any Idea why ?
Thanks
JG