Rails - Feb 2006 - rescue_action_in_public in development environment?

hi,

i''m trying to implement rescue_action_in_public as a 
catch-all to redirect to an error page when an 
exception is thrown (actually, just for testing, 
I''m rendering "ERROR").  However, putting 

def render_action_in_public
  render( :text=>"ERROR" )
end 

in either a specific controller or even application.rb, has 
no effect on the app redirecting on an exception.  For 
instance, if I put a bogus controller name in the URL it 
still gives a "Routing Error" message instead of the rendered
"ERROR." Similarly, specifying a non-existant action in a URL
gives an "Unknown Action" error.

I''m guessing this a result of being in development environment
(which I am).  I know you can specify an IP as a developer machine
in production mode via ''local_request?'', but how about the
other
way around?